28568304 has 30 divisors (see below), whose sum is σ = 79951976. Its totient is φ = 9522720.

The previous prime is 28568303. The next prime is 28568311. The reversal of 28568304 is 40386582.

It is a super-2 number, since 2×28568304² = 1632295986872832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28568303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99052 + ... + 99339.

Almost surely, 2^28568304 is an apocalyptic number.

28568304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28568304 is an abundant number, since it is smaller than the sum of its proper divisors (51383672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28568304 is a wasteful number, since it uses less digits than its factorization.

28568304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198405 (or 198396 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28568304 is about 5344.9325533630. The cubic root of 28568304 is about 305.6995641522.

The spelling of 28568304 in words is "twenty-eight million, five hundred sixty-eight thousand, three hundred four".