57216828 has 24 divisors (see below), whose sum is σ = 140533120. Its totient is φ = 18068400.

The previous prime is 57216823. The next prime is 57216829. The reversal of 57216828 is 82861275.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57216823) 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, 125248 + ... + 125703.

Almost surely, 2^57216828 is an apocalyptic number.

It is an amenable number.

57216828 is an abundant number, since it is smaller than the sum of its proper divisors (83316292).

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

57216828 is a wasteful number, since it uses less digits than its factorization.

57216828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250977 (or 250975 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 57216828 is about 7564.1805901234. The cubic root of 57216828 is about 385.3374856042.

The spelling of 57216828 in words is "fifty-seven million, two hundred sixteen thousand, eight hundred twenty-eight".