56157878 has 16 divisors (see below), whose sum is σ = 97591200. Its totient is φ = 23737536.

The previous prime is 56157877. The next prime is 56157887. The reversal of 56157878 is 87875165.

It is a happy number.

It is a super-2 number, since 2×56157878² = 6307414522925768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56157877) 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, 26453 + ... + 28496.

It is an arithmetic number, because the mean of its divisors is an integer number (6099450).

Almost surely, 2^56157878 is an apocalyptic number.

56157878 is a deficient number, since it is larger than the sum of its proper divisors (41433322).

56157878 is a wasteful number, since it uses less digits than its factorization.

56157878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55031.

The product of its digits is 470400, while the sum is 47.

The square root of 56157878 is about 7493.8560167647. The cubic root of 56157878 is about 382.9454346251.

The spelling of 56157878 in words is "fifty-six million, one hundred fifty-seven thousand, eight hundred seventy-eight".