57681620 has 12 divisors (see below), whose sum is σ = 121131444. Its totient is φ = 23072640.

The previous prime is 57681599. The next prime is 57681647. The reversal of 57681620 is 2618675.

57681620 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32239684 + 25441936 = 5678^2 + 5044^2 .

57681620 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442021 + ... + 1442060.

It is an arithmetic number, because the mean of its divisors is an integer number (10094287).

Almost surely, 2^57681620 is an apocalyptic number.

It is an amenable number.

57681620 is an abundant number, since it is smaller than the sum of its proper divisors (63449824).

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

57681620 is a wasteful number, since it uses less digits than its factorization.

57681620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884090 (or 2884088 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 57681620 is about 7594.8416705024. The cubic root of 57681620 is about 386.3780826642.

The spelling of 57681620 in words is "fifty-seven million, six hundred eighty-one thousand, six hundred twenty".