57782220 has 48 divisors (see below), whose sum is σ = 162123360. Its totient is φ = 15376896.

The previous prime is 57782209. The next prime is 57782251. The reversal of 57782220 is 2228775.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50616 + ... + 51744.

It is an arithmetic number, because the mean of its divisors is an integer number (3377570).

Almost surely, 2^57782220 is an apocalyptic number.

It is an amenable number.

57782220 is an abundant number, since it is smaller than the sum of its proper divisors (104341140).

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

57782220 is a wasteful number, since it uses less digits than its factorization.

57782220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 57782220 is about 7601.4617015414. The cubic root of 57782220 is about 386.6025739322.

The spelling of 57782220 in words is "fifty-seven million, seven hundred eighty-two thousand, two hundred twenty".