57056620 has 48 divisors (see below), whose sum is σ = 128550240. Its totient is φ = 21206016.

The previous prime is 57056609. The next prime is 57056663. The reversal of 57056620 is 2665075.

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, 18724 + ... + 21556.

It is an arithmetic number, because the mean of its divisors is an integer number (2678130).

Almost surely, 2^57056620 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 57056620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64275120).

57056620 is an abundant number, since it is smaller than the sum of its proper divisors (71493620).

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

57056620 is a wasteful number, since it uses less digits than its factorization.

57056620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914 (or 2912 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 57056620 is about 7553.5832556476. The cubic root of 57056620 is about 384.9774991066.

The spelling of 57056620 in words is "fifty-seven million, fifty-six thousand, six hundred twenty".