57640380 has 48 divisors (see below), whose sum is σ = 184450560. Its totient is φ = 13174848.

The previous prime is 57640343. The next prime is 57640403. The reversal of 57640380 is 8304675.

It is a congruent number.

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, 68200 + ... + 69039.

It is an arithmetic number, because the mean of its divisors is an integer number (3842720).

Almost surely, 2^57640380 is an apocalyptic number.

It is an amenable number.

57640380 is an abundant number, since it is smaller than the sum of its proper divisors (126810180).

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

57640380 is a wasteful number, since it uses less digits than its factorization.

57640380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137258 (or 137256 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 57640380 is about 7592.1261844097. The cubic root of 57640380 is about 386.2859791999.

The spelling of 57640380 in words is "fifty-seven million, six hundred forty thousand, three hundred eighty".