57640328 has 8 divisors (see below), whose sum is σ = 108075630. Its totient is φ = 28820160.

The previous prime is 57640321. The next prime is 57640333. The reversal of 57640328 is 82304675.

It is a happy number.

57640328 is digitally balanced in base 2, 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 only one way, i.e., 55323844 + 2316484 = 7438^2 + 1522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (57640321) by changing a digit.

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 as a sum of consecutive naturals, namely, 3602513 + ... + 3602528.

Almost surely, 2^57640328 is an apocalyptic number.

It is an amenable number.

57640328 is a deficient number, since it is larger than the sum of its proper divisors (50435302).

57640328 is a wasteful number, since it uses less digits than its factorization.

57640328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205047 (or 7205043 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 57640328 is about 7592.1227598084. The cubic root of 57640328 is about 386.2858630379.

It can be divided in two parts, 576 and 40328, that added together give a palindrome (40904).

The spelling of 57640328 in words is "fifty-seven million, six hundred forty thousand, three hundred twenty-eight".