57056730 has 16 divisors (see below), whose sum is σ = 136936224. Its totient is φ = 15215120.

The previous prime is 57056729. The next prime is 57056759. The reversal of 57056730 is 3765075.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 57056691 and 57056700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950916 + ... + 950975.

It is an arithmetic number, because the mean of its divisors is an integer number (8558514).

Almost surely, 2^57056730 is an apocalyptic number.

57056730 is an abundant number, since it is smaller than the sum of its proper divisors (79879494).

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

57056730 is a wasteful number, since it uses less digits than its factorization.

57056730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901901.

The product of its (nonzero) digits is 22050, while the sum is 33.

The square root of 57056730 is about 7553.5905369566. The cubic root of 57056730 is about 384.9777465071.

The spelling of 57056730 in words is "fifty-seven million, fifty-six thousand, seven hundred thirty".