57657228 has 48 divisors (see below), whose sum is σ = 141039360. Its totient is φ = 18297664.

The previous prime is 57657209. The next prime is 57657239. The reversal of 57657228 is 82275675.

It is a self number, because there is not a number n which added to its sum of digits gives 57657228.

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, 87163 + ... + 87821.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^57657228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57657228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70519680).

57657228 is an abundant number, since it is smaller than the sum of its proper divisors (83382132).

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

57657228 is a wasteful number, since it uses less digits than its factorization.

57657228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1004 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 57657228 is about 7593.2356739403. The cubic root of 57657228 is about 386.3236120318.

The spelling of 57657228 in words is "fifty-seven million, six hundred fifty-seven thousand, two hundred twenty-eight".