57128368 has 20 divisors (see below), whose sum is σ = 120748968. Its totient is φ = 25967360.

The previous prime is 57128339. The next prime is 57128369. The reversal of 57128368 is 86382175.

It is a self number, because there is not a number n which added to its sum of digits gives 57128368.

It is not an unprimeable number, because it can be changed into a prime (57128369) 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, 162121 + ... + 162472.

Almost surely, 2^57128368 is an apocalyptic number.

It is an amenable number.

57128368 is an abundant number, since it is smaller than the sum of its proper divisors (63620600).

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

57128368 is a wasteful number, since it uses less digits than its factorization.

57128368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324612 (or 324606 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 57128368 is about 7558.3310327082. The cubic root of 57128368 is about 385.1387996758.

The spelling of 57128368 in words is "fifty-seven million, one hundred twenty-eight thousand, three hundred sixty-eight".