56438407 has 4 divisors (see below), whose sum is σ = 56638120. Its totient is φ = 56238696.

The previous prime is 56438387. The next prime is 56438413. The reversal of 56438407 is 70483465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56438407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56438477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99432 + ... + 99997.

It is an arithmetic number, because the mean of its divisors is an integer number (14159530).

Almost surely, 2^56438407 is an apocalyptic number.

56438407 is a deficient number, since it is larger than the sum of its proper divisors (199713).

56438407 is a wasteful number, since it uses less digits than its factorization.

56438407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199712.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 56438407 is about 7512.5499665560. The cubic root of 56438407 is about 383.5820263136.

The spelling of 56438407 in words is "fifty-six million, four hundred thirty-eight thousand, four hundred seven".