57228657 has 16 divisors (see below), whose sum is σ = 79749120. Its totient is φ = 36468432.

The previous prime is 57228641. The next prime is 57228659. The reversal of 57228657 is 75682275.

It is not a de Polignac number, because 57228657 - 2⁴ = 57228641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57228659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344 + ... + 10782.

It is an arithmetic number, because the mean of its divisors is an integer number (4984320).

Almost surely, 2^57228657 is an apocalyptic number.

It is an amenable number.

57228657 is a deficient number, since it is larger than the sum of its proper divisors (22520463).

57228657 is a wasteful number, since it uses less digits than its factorization.

57228657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9532.

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

The square root of 57228657 is about 7564.9624585982. The cubic root of 57228657 is about 385.3640386493.

The spelling of 57228657 in words is "fifty-seven million, two hundred twenty-eight thousand, six hundred fifty-seven".