56387839 has 8 divisors (see below), whose sum is σ = 59527280. Its totient is φ = 53413560.

The previous prime is 56387831. The next prime is 56387857. The reversal of 56387839 is 93878365.

It is not a de Polignac number, because 56387839 - 2³ = 56387831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56387792 and 56387801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56387831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2749 + ... + 10969.

It is an arithmetic number, because the mean of its divisors is an integer number (7440910).

Almost surely, 2^56387839 is an apocalyptic number.

56387839 is a deficient number, since it is larger than the sum of its proper divisors (3139441).

56387839 is an frugal number, since it uses more digits than its factorization.

56387839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278 (or 8240 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 56387839 is about 7509.1836440455. The cubic root of 56387839 is about 383.4674307574.

The spelling of 56387839 in words is "fifty-six million, three hundred eighty-seven thousand, eight hundred thirty-nine".