56639706 has 16 divisors (see below), whose sum is σ = 113400000. Its totient is φ = 18859808.

The previous prime is 56639663. The next prime is 56639707. The reversal of 56639706 is 60793665.

It is not an unprimeable number, because it can be changed into a prime (56639707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (7087500).

Almost surely, 2^56639706 is an apocalyptic number.

56639706 is an abundant number, since it is smaller than the sum of its proper divisors (56760294).

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

56639706 is a wasteful number, since it uses less digits than its factorization.

56639706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 56639706 is about 7525.9355564607. The cubic root of 56639706 is about 384.0375261721.

The spelling of 56639706 in words is "fifty-six million, six hundred thirty-nine thousand, seven hundred six".