56639487 has 16 divisors (see below), whose sum is σ = 77023872. Its totient is φ = 37015200.

The previous prime is 56639483. The next prime is 56639507. The reversal of 56639487 is 78493665.

It is not a de Polignac number, because 56639487 - 2² = 56639483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56639483) 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, 31548 + ... + 33294.

It is an arithmetic number, because the mean of its divisors is an integer number (4813992).

Almost surely, 2^56639487 is an apocalyptic number.

56639487 is a deficient number, since it is larger than the sum of its proper divisors (20384385).

56639487 is a wasteful number, since it uses less digits than its factorization.

56639487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958.

The product of its digits is 1088640, while the sum is 48.

The square root of 56639487 is about 7525.9210067606. The cubic root of 56639487 is about 384.0370312052.

The spelling of 56639487 in words is "fifty-six million, six hundred thirty-nine thousand, four hundred eighty-seven".