56831387 has 8 divisors (see below), whose sum is σ = 59376240. Its totient is φ = 54325600.

The previous prime is 56831363. The next prime is 56831389. The reversal of 56831387 is 78313865.

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 56831387 - 2¹⁸ = 56569243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56831389) 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, 6773 + ... + 12630.

It is an arithmetic number, because the mean of its divisors is an integer number (7422030).

Almost surely, 2^56831387 is an apocalyptic number.

56831387 is a deficient number, since it is larger than the sum of its proper divisors (2544853).

56831387 is a wasteful number, since it uses less digits than its factorization.

56831387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19533.

The product of its digits is 120960, while the sum is 41.

The square root of 56831387 is about 7538.6594962234. The cubic root of 56831387 is about 384.4702603651.

The spelling of 56831387 in words is "fifty-six million, eight hundred thirty-one thousand, three hundred eighty-seven".