57128642 has 8 divisors (see below), whose sum is σ = 89418816. Its totient is φ = 27322372.

The previous prime is 57128627. The next prime is 57128671. The reversal of 57128642 is 24682175.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620918 + ... + 621009.

It is an arithmetic number, because the mean of its divisors is an integer number (11177352).

Almost surely, 2^57128642 is an apocalyptic number.

57128642 is a deficient number, since it is larger than the sum of its proper divisors (32290174).

57128642 is a wasteful number, since it uses less digits than its factorization.

57128642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241952.

The product of its digits is 26880, while the sum is 35.

The square root of 57128642 is about 7558.3491583811. The cubic root of 57128642 is about 385.1394154111.

The spelling of 57128642 in words is "fifty-seven million, one hundred twenty-eight thousand, six hundred forty-two".