28658856 has 32 divisors (see below), whose sum is σ = 71828640. Its totient is φ = 9528768.

The previous prime is 28658813. The next prime is 28658857. The reversal of 28658856 is 65885682.

It is not an unprimeable number, because it can be changed into a prime (28658857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9930 + ... + 12486.

It is an arithmetic number, because the mean of its divisors is an integer number (2244645).

Almost surely, 2^28658856 is an apocalyptic number.

It is an amenable number.

28658856 is an abundant number, since it is smaller than the sum of its proper divisors (43169784).

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

28658856 is a wasteful number, since it uses less digits than its factorization.

28658856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033 (or 3029 counting only the distinct ones).

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

The square root of 28658856 is about 5353.3966787452. The cubic root of 28658856 is about 306.0222120661.

The spelling of 28658856 in words is "twenty-eight million, six hundred fifty-eight thousand, eight hundred fifty-six".