304 is the natural number following 303 and preceding 305.

In mathematics

  • 304 is an even composite number with two prime factor.[1]
  • 304 is the sum of consecutive primes in two different ways. It is the sum of 41+43+47+53+59+61 and of 23+29+31+37+41+43+47+53.
  • 304 is a primitive semiperfect number meaning that it is a semiperfect number that is not divisible by any other semiperfect number.[2]
  • 304 is an untouchable number meaning that it is not equal to the sum of any number’s proper divisors.[3]
  • 304 is a nontotient number meaning that it is an even number where phi(x) cannot result in that number.[4]

References

  1. ^ "Facts about the integer". mathworld.wolfram.com.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A006036 (Primitive pseudoperfect numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A005114 (Untouchable numbers, also called non aliquot numbers: impossible values for the sum of aliquot parts function (A001065))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ Sloane, N. J. A. (ed.). "Sequence A005277". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.