56639460 has 48 divisors (see below), whose sum is σ = 159860736. Its totient is φ = 14982912.

The previous prime is 56639447. The next prime is 56639467. The reversal of 56639460 is 6493665.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56639467) 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, 3904 + ... + 11336.

It is an arithmetic number, because the mean of its divisors is an integer number (3330432).

Almost surely, 2^56639460 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 56639460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79930368).

56639460 is an abundant number, since it is smaller than the sum of its proper divisors (103221276).

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

56639460 is a wasteful number, since it uses less digits than its factorization.

56639460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572 (or 7570 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 56639460 is about 7525.9192129600. The cubic root of 56639460 is about 384.0369701818.

The spelling of 56639460 in words is "fifty-six million, six hundred thirty-nine thousand, four hundred sixty".