57057784 has 16 divisors (see below), whose sum is σ = 122266800. Its totient is φ = 24453312.

The previous prime is 57057757. The next prime is 57057787. The reversal of 57057784 is 48775075.

It is a self number, because there is not a number n which added to its sum of digits gives 57057784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57057787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509389 + ... + 509500.

It is an arithmetic number, because the mean of its divisors is an integer number (7641675).

Almost surely, 2^57057784 is an apocalyptic number.

It is an amenable number.

57057784 is an abundant number, since it is smaller than the sum of its proper divisors (65209016).

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

57057784 is a wasteful number, since it uses less digits than its factorization.

57057784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018902 (or 1018898 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 57057784 is about 7553.6603047794. The cubic root of 57057784 is about 384.9801170369.

The spelling of 57057784 in words is "fifty-seven million, fifty-seven thousand, seven hundred eighty-four".