56639387 has 8 divisors (see below), whose sum is σ = 66819072. Its totient is φ = 46981800.

The previous prime is 56639383. The next prime is 56639411. The reversal of 56639387 is 78393665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56639387 - 2² = 56639383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56639383) 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, 130289 + ... + 130722.

It is an arithmetic number, because the mean of its divisors is an integer number (8352384).

Almost surely, 2^56639387 is an apocalyptic number.

56639387 is a deficient number, since it is larger than the sum of its proper divisors (10179685).

56639387 is a wasteful number, since it uses less digits than its factorization.

56639387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261049.

The product of its digits is 816480, while the sum is 47.

The square root of 56639387 is about 7525.9143630525. The cubic root of 56639387 is about 384.0368051926.

The spelling of 56639387 in words is "fifty-six million, six hundred thirty-nine thousand, three hundred eighty-seven".