56442399 has 8 divisors (see below), whose sum is σ = 81045552. Its totient is φ = 34733760.

The previous prime is 56442383. The next prime is 56442401. The reversal of 56442399 is 99324465.

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

It is not a de Polignac number, because 56442399 - 2⁴ = 56442383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56442399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56442349) 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 7 ways as a sum of consecutive naturals, for example, 723582 + ... + 723659.

It is an arithmetic number, because the mean of its divisors is an integer number (10130694).

Almost surely, 2^56442399 is an apocalyptic number.

56442399 is a deficient number, since it is larger than the sum of its proper divisors (24603153).

56442399 is a wasteful number, since it uses less digits than its factorization.

56442399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447257.

The product of its digits is 233280, while the sum is 42.

The square root of 56442399 is about 7512.8156506066. The cubic root of 56442399 is about 383.5910699385.

The spelling of 56442399 in words is "fifty-six million, four hundred forty-two thousand, three hundred ninety-nine".