57156426 has 24 divisors (see below), whose sum is σ = 129224160. Its totient is φ = 18223656.

The previous prime is 57156413. The next prime is 57156493. The reversal of 57156426 is 62465175.

It is a happy number.

57156426 is a `hidden beast` number, since 5 + 7 + 1 + 5 + 642 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68616 + ... + 69443.

It is an arithmetic number, because the mean of its divisors is an integer number (5384340).

Almost surely, 2^57156426 is an apocalyptic number.

57156426 is an abundant number, since it is smaller than the sum of its proper divisors (72067734).

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

57156426 is a wasteful number, since it uses less digits than its factorization.

57156426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138090 (or 138087 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 57156426 is about 7560.1869024516. The cubic root of 57156426 is about 385.2018416529.

The spelling of 57156426 in words is "fifty-seven million, one hundred fifty-six thousand, four hundred twenty-six".