56442391 has 8 divisors (see below), whose sum is σ = 58971744. Its totient is φ = 53919360.

The previous prime is 56442383. The next prime is 56442401. The reversal of 56442391 is 19324465.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56442391 - 2³ = 56442383 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 (56442301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33235 + ... + 34891.

It is an arithmetic number, because the mean of its divisors is an integer number (7371468).

Almost surely, 2^56442391 is an apocalyptic number.

56442391 is a deficient number, since it is larger than the sum of its proper divisors (2529353).

56442391 is a wasteful number, since it uses less digits than its factorization.

56442391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161.

The product of its digits is 25920, while the sum is 34.

The square root of 56442391 is about 7512.8151181831. The cubic root of 56442391 is about 383.5910518155.

The spelling of 56442391 in words is "fifty-six million, four hundred forty-two thousand, three hundred ninety-one".