56178440 has 64 divisors (see below), whose sum is σ = 134092800. Its totient is φ = 21123072.

The previous prime is 56178427. The next prime is 56178449. The reversal of 56178440 is 4487165.

It is a self number, because there is not a number n which added to its sum of digits gives 56178440.

It is not an unprimeable number, because it can be changed into a prime (56178449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146489 + ... + 146871.

It is an arithmetic number, because the mean of its divisors is an integer number (2095200).

Almost surely, 2^56178440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56178440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67046400).

56178440 is an abundant number, since it is smaller than the sum of its proper divisors (77914360).

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

56178440 is a wasteful number, since it uses less digits than its factorization.

56178440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 602 counting only the distinct ones).

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

The square root of 56178440 is about 7495.2278150834. The cubic root of 56178440 is about 382.9921669416.

The spelling of 56178440 in words is "fifty-six million, one hundred seventy-eight thousand, four hundred forty".