56538399 has 16 divisors (see below), whose sum is σ = 76896864. Its totient is φ = 36940800.

The previous prime is 56538353. The next prime is 56538401. The reversal of 56538399 is 99383565.

It is not a de Polignac number, because 56538399 - 2¹⁹ = 56014111 is a prime.

It is a super-2 number, since 2×56538399² = 6393181122966402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56530399) 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 15 ways as a sum of consecutive naturals, for example, 95047 + ... + 95639.

It is an arithmetic number, because the mean of its divisors is an integer number (4806054).

Almost surely, 2^56538399 is an apocalyptic number.

56538399 is a deficient number, since it is larger than the sum of its proper divisors (20358465).

56538399 is a wasteful number, since it uses less digits than its factorization.

56538399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its digits is 874800, while the sum is 48.

The square root of 56538399 is about 7519.2020188315. The cubic root of 56538399 is about 383.8084235905.

The spelling of 56538399 in words is "fifty-six million, five hundred thirty-eight thousand, three hundred ninety-nine".