57445380 has 72 divisors (see below), whose sum is σ = 184510872. Its totient is φ = 14416896.

The previous prime is 57445309. The next prime is 57445439. The reversal of 57445380 is 8354475.

57445380 is a `hidden beast` number, since 574 + 4 + 5 + 3 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32285124 + 25160256 = 5682^2 + 5016^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6327 + ... + 12446.

It is an arithmetic number, because the mean of its divisors is an integer number (2562651).

Almost surely, 2^57445380 is an apocalyptic number.

It is an amenable number.

57445380 is an abundant number, since it is smaller than the sum of its proper divisors (127065492).

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

57445380 is a wasteful number, since it uses less digits than its factorization.

57445380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18805 (or 18800 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 57445380 is about 7579.2730522129. The cubic root of 57445380 is about 385.8498794296.

It can be divided in two parts, 574 and 45380, that added together give a palindrome (45954).

The spelling of 57445380 in words is "fifty-seven million, four hundred forty-five thousand, three hundred eighty".