56618406 has 64 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 17113248.

The previous prime is 56618389. The next prime is 56618413. The reversal of 56618406 is 60481665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40735 + ... + 42101.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^56618406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56618406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68947200).

56618406 is an abundant number, since it is smaller than the sum of its proper divisors (81275994).

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

56618406 is a wasteful number, since it uses less digits than its factorization.

56618406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 56618406 is about 7524.5203169372. The cubic root of 56618406 is about 383.9893795891.

The spelling of 56618406 in words is "fifty-six million, six hundred eighteen thousand, four hundred six".