57128694 has 16 divisors (see below), whose sum is σ = 130579968. Its totient is φ = 16322472.

The previous prime is 57128693. The next prime is 57128699. The reversal of 57128694 is 49682175.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1360207 = 57128694 / (5 + 7 + 1 + 2 + 8 + 6 + 9 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57128693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680062 + ... + 680145.

It is an arithmetic number, because the mean of its divisors is an integer number (8161248).

Almost surely, 2^57128694 is an apocalyptic number.

57128694 is an abundant number, since it is smaller than the sum of its proper divisors (73451274).

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

57128694 is a wasteful number, since it uses less digits than its factorization.

57128694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360219.

The product of its digits is 120960, while the sum is 42.

The square root of 57128694 is about 7558.3525982849. The cubic root of 57128694 is about 385.1395322658.

The spelling of 57128694 in words is "fifty-seven million, one hundred twenty-eight thousand, six hundred ninety-four".