56178990 has 72 divisors (see below), whose sum is σ = 169926120. Its totient is φ = 12839904.

The previous prime is 56178943. The next prime is 56179001. The reversal of 56178990 is 9987165.

56178990 is a `hidden beast` number, since 561 + 7 + 89 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1960 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (2360085).

Almost surely, 2^56178990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56178990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84963060).

56178990 is an abundant number, since it is smaller than the sum of its proper divisors (113747130).

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

56178990 is a wasteful number, since it uses less digits than its factorization.

56178990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12766 (or 12756 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 56178990 is about 7495.2645050058. The cubic root of 56178990 is about 382.9934167984.

The spelling of 56178990 in words is "fifty-six million, one hundred seventy-eight thousand, nine hundred ninety".