57720380 has 12 divisors (see below), whose sum is σ = 121212840. Its totient is φ = 23088144.

The previous prime is 57720367. The next prime is 57720431. The reversal of 57720380 is 8302775.

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, 1442990 + ... + 1443029.

It is an arithmetic number, because the mean of its divisors is an integer number (10101070).

Almost surely, 2^57720380 is an apocalyptic number.

It is an amenable number.

57720380 is an abundant number, since it is smaller than the sum of its proper divisors (63492460).

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

57720380 is a wasteful number, since it uses less digits than its factorization.

57720380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886028 (or 2886026 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 57720380 is about 7597.3929739089. The cubic root of 57720380 is about 386.4646074028.

The spelling of 57720380 in words is "fifty-seven million, seven hundred twenty thousand, three hundred eighty".