28616812 has 24 divisors (see below), whose sum is σ = 60247040. Its totient is φ = 11618640.

The previous prime is 28616789. The next prime is 28616821. The reversal of 28616812 is 21861682.

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, 26364 + ... + 27427.

Almost surely, 2^28616812 is an apocalyptic number.

It is an amenable number.

28616812 is an abundant number, since it is smaller than the sum of its proper divisors (31630228).

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

28616812 is a wasteful number, since it uses less digits than its factorization.

28616812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53821 (or 53819 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 28616812 is about 5349.4683848024. The cubic root of 28616812 is about 305.8724887729.

The spelling of 28616812 in words is "twenty-eight million, six hundred sixteen thousand, eight hundred twelve".