56439955 has 32 divisors (see below), whose sum is σ = 80176320. Its totient is φ = 37601280.

The previous prime is 56439947. The next prime is 56439989. The reversal of 56439955 is 55993465.

It is not a de Polignac number, because 56439955 - 2³ = 56439947 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137791 + ... + 138199.

It is an arithmetic number, because the mean of its divisors is an integer number (2505510).

Almost surely, 2^56439955 is an apocalyptic number.

56439955 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56439955 is a deficient number, since it is larger than the sum of its proper divisors (23736365).

56439955 is a wasteful number, since it uses less digits than its factorization.

56439955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 729000, while the sum is 46.

The square root of 56439955 is about 7512.6529934504. The cubic root of 56439955 is about 383.5855332609.

The spelling of 56439955 in words is "fifty-six million, four hundred thirty-nine thousand, nine hundred fifty-five".