56638678 has 4 divisors (see below), whose sum is σ = 84958020. Its totient is φ = 28319338.

The previous prime is 56638669. The next prime is 56638691. The reversal of 56638678 is 87683665.

It is a happy number.

56638678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159668 + ... + 14159671.

It is an arithmetic number, because the mean of its divisors is an integer number (21239505).

Almost surely, 2^56638678 is an apocalyptic number.

56638678 is a deficient number, since it is larger than the sum of its proper divisors (28319342).

56638678 is a wasteful number, since it uses less digits than its factorization.

56638678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319341.

The product of its digits is 1451520, while the sum is 49.

The square root of 56638678 is about 7525.8672589941. The cubic root of 56638678 is about 384.0352027551.

It can be divided in two parts, 5663 and 8678, that added together give a palindrome (14341).

The spelling of 56638678 in words is "fifty-six million, six hundred thirty-eight thousand, six hundred seventy-eight".