56401506 has 48 divisors (see below), whose sum is σ = 140107968. Its totient is φ = 16063200.

The previous prime is 56401489. The next prime is 56401507. The reversal of 56401506 is 60510465.

It is a happy number.

56401506 is a `hidden beast` number, since 5 + 640 + 15 + 0 + 6 = 666.

It is a super-2 number, since 2×56401506² = 6362259758136072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56401506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56401507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57601 + ... + 58571.

It is an arithmetic number, because the mean of its divisors is an integer number (2918916).

Almost surely, 2^56401506 is an apocalyptic number.

56401506 is an abundant number, since it is smaller than the sum of its proper divisors (83706462).

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

56401506 is a wasteful number, since it uses less digits than its factorization.

56401506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56401506 is about 7510.0936079386. The cubic root of 56401506 is about 383.4984092220.

The spelling of 56401506 in words is "fifty-six million, four hundred one thousand, five hundred six".