57531620 has 48 divisors (see below), whose sum is σ = 128520000. Its totient is φ = 21571200.

The previous prime is 57531611. The next prime is 57531623. The reversal of 57531620 is 2613575.

It is not an unprimeable number, because it can be changed into a prime (57531623) 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, 37631 + ... + 39129.

It is an arithmetic number, because the mean of its divisors is an integer number (2677500).

Almost surely, 2^57531620 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 57531620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64260000).

57531620 is an abundant number, since it is smaller than the sum of its proper divisors (70988380).

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

57531620 is a wasteful number, since it uses less digits than its factorization.

57531620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 57531620 is about 7584.9601185504. The cubic root of 57531620 is about 386.0428688730.

The spelling of 57531620 in words is "fifty-seven million, five hundred thirty-one thousand, six hundred twenty".