56904393 has 16 divisors (see below), whose sum is σ = 93382016. Its totient is φ = 30015360.

The previous prime is 56904391. The next prime is 56904403. The reversal of 56904393 is 39340965.

It is not a de Polignac number, because 56904393 - 2¹ = 56904391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is the 7544-th Hogben number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56904391) by changing a digit.

It is a nontrivial repunit in base 7543.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103948 + ... + 104493.

It is an arithmetic number, because the mean of its divisors is an integer number (5836376).

Almost surely, 2^56904393 is an apocalyptic number.

It is an amenable number.

56904393 is a deficient number, since it is larger than the sum of its proper divisors (36477623).

56904393 is a wasteful number, since it uses less digits than its factorization.

56904393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208464.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 56904393 is about 7543.5000497117. The cubic root of 56904393 is about 384.6348209880.

The spelling of 56904393 in words is "fifty-six million, nine hundred four thousand, three hundred ninety-three".