28856568 has 32 divisors (see below), whose sum is σ = 77691600. Its totient is φ = 8878848.

The previous prime is 28856557. The next prime is 28856587. The reversal of 28856568 is 86565882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45933 + ... + 46556.

Almost surely, 2^28856568 is an apocalyptic number.

It is an amenable number.

28856568 is an abundant number, since it is smaller than the sum of its proper divisors (48835032).

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

28856568 is a wasteful number, since it uses less digits than its factorization.

28856568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92511 (or 92507 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 28856568 is about 5371.8309727690. The cubic root of 28856568 is about 306.7243296316.

It can be divided in two parts, 2885 and 6568, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 28856568 in words is "twenty-eight million, eight hundred fifty-six thousand, five hundred sixty-eight".