28857684 has 12 divisors (see below), whose sum is σ = 67334624. Its totient is φ = 9619224.

The previous prime is 28857643. The next prime is 28857701. The reversal of 28857684 is 48675882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202392 + ... + 1202415.

Almost surely, 2^28857684 is an apocalyptic number.

It is an amenable number.

28857684 is an abundant number, since it is smaller than the sum of its proper divisors (38476940).

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

28857684 is a wasteful number, since it uses less digits than its factorization.

28857684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404814 (or 2404812 counting only the distinct ones).

The product of its digits is 860160, while the sum is 48.

The square root of 28857684 is about 5371.9348469616. The cubic root of 28857684 is about 306.7282836700.

The spelling of 28857684 in words is "twenty-eight million, eight hundred fifty-seven thousand, six hundred eighty-four".