56136638 has 4 divisors (see below), whose sum is σ = 84204960. Its totient is φ = 28068318.

The previous prime is 56136637. The next prime is 56136643. The reversal of 56136638 is 83663165.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56136631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14034158 + ... + 14034161.

It is an arithmetic number, because the mean of its divisors is an integer number (21051240).

Almost surely, 2^56136638 is an apocalyptic number.

56136638 is a deficient number, since it is larger than the sum of its proper divisors (28068322).

56136638 is a wasteful number, since it uses less digits than its factorization.

56136638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28068321.

The product of its digits is 77760, while the sum is 38.

The square root of 56136638 is about 7492.4387218048. The cubic root of 56136638 is about 382.8971494038.

The spelling of 56136638 in words is "fifty-six million, one hundred thirty-six thousand, six hundred thirty-eight".