57440644 has 12 divisors (see below), whose sum is σ = 103763968. Its totient is φ = 27793800.

The previous prime is 57440623. The next prime is 57440653. The reversal of 57440644 is 44604475.

57440644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231492 + ... + 231739.

Almost surely, 2^57440644 is an apocalyptic number.

It is an amenable number.

57440644 is a deficient number, since it is larger than the sum of its proper divisors (46323324).

57440644 is a wasteful number, since it uses less digits than its factorization.

57440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463266 (or 463264 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 57440644 is about 7578.9606147545. The cubic root of 57440644 is about 385.8392755293.

The spelling of 57440644 in words is "fifty-seven million, four hundred forty thousand, six hundred forty-four".