57285820 has 12 divisors (see below), whose sum is σ = 120300264. Its totient is φ = 22914320.

The previous prime is 57285791. The next prime is 57285841. The reversal of 57285820 is 2858275.

It is a self number, because there is not a number n which added to its sum of digits gives 57285820.

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, 1432126 + ... + 1432165.

It is an arithmetic number, because the mean of its divisors is an integer number (10025022).

Almost surely, 2^57285820 is an apocalyptic number.

It is an amenable number.

57285820 is an abundant number, since it is smaller than the sum of its proper divisors (63014444).

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

57285820 is a wasteful number, since it uses less digits than its factorization.

57285820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864300 (or 2864298 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 57285820 is about 7568.7396573009. The cubic root of 57285820 is about 385.4923032597.

The spelling of 57285820 in words is "fifty-seven million, two hundred eighty-five thousand, eight hundred twenty".