57057228 has 36 divisors (see below), whose sum is σ = 151820760. Its totient is φ = 18017856.

The previous prime is 57057191. The next prime is 57057229. The reversal of 57057228 is 82275075.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57057192 and 57057201.

It is not an unprimeable number, because it can be changed into a prime (57057229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41025 + ... + 42392.

Almost surely, 2^57057228 is an apocalyptic number.

It is an amenable number.

57057228 is an abundant number, since it is smaller than the sum of its proper divisors (94763532).

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

57057228 is a wasteful number, since it uses less digits than its factorization.

57057228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83446 (or 83441 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 57057228 is about 7553.6235013403. The cubic root of 57057228 is about 384.9788665523.

The spelling of 57057228 in words is "fifty-seven million, fifty-seven thousand, two hundred twenty-eight".