57640028 has 12 divisors (see below), whose sum is σ = 100933560. Its totient is φ = 28801872.

The previous prime is 57640027. The next prime is 57640061. The reversal of 57640028 is 82004675.

It is a junction number, because it is equal to n+sod(n) for n = 57639976 and 57640003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57640021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4703 + ... + 11721.

It is an arithmetic number, because the mean of its divisors is an integer number (8411130).

Almost surely, 2^57640028 is an apocalyptic number.

It is an amenable number.

57640028 is a deficient number, since it is larger than the sum of its proper divisors (43293532).

57640028 is a wasteful number, since it uses less digits than its factorization.

57640028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076 (or 9074 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 57640028 is about 7592.1030024625. The cubic root of 57640028 is about 386.2851928707.

It can be divided in two parts, 576 and 40028, that added together give a palindrome (40604).

The spelling of 57640028 in words is "fifty-seven million, six hundred forty thousand, twenty-eight".