28857912 has 32 divisors (see below), whose sum is σ = 72631680. Its totient is φ = 9554400.

The previous prime is 28857911. The next prime is 28857919. The reversal of 28857912 is 21975882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857911) 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, 358 + ... + 7605.

It is an arithmetic number, because the mean of its divisors is an integer number (2269740).

Almost surely, 2^28857912 is an apocalyptic number.

It is an amenable number.

28857912 is an abundant number, since it is smaller than the sum of its proper divisors (43773768).

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

28857912 is a wasteful number, since it uses less digits than its factorization.

28857912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8123 (or 8119 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 28857912 is about 5371.9560683237. The cubic root of 28857912 is about 306.7290914718.

The spelling of 28857912 in words is "twenty-eight million, eight hundred fifty-seven thousand, nine hundred twelve".