56438913 has 16 divisors (see below), whose sum is σ = 76211456. Its totient is φ = 37149840.

The previous prime is 56438909. The next prime is 56438933. The reversal of 56438913 is 31983465.

It is not a de Polignac number, because 56438913 - 2² = 56438909 is a prime.

It is a super-3 number, since 3×56438913³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56438903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102906 + ... + 103452.

It is an arithmetic number, because the mean of its divisors is an integer number (4763216).

Almost surely, 2^56438913 is an apocalyptic number.

It is an amenable number.

56438913 is a deficient number, since it is larger than the sum of its proper divisors (19772543).

56438913 is a wasteful number, since it uses less digits than its factorization.

56438913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its digits is 77760, while the sum is 39.

The square root of 56438913 is about 7512.5836434611. The cubic root of 56438913 is about 383.5831726484.

The spelling of 56438913 in words is "fifty-six million, four hundred thirty-eight thousand, nine hundred thirteen".