56178397 has 16 divisors (see below), whose sum is σ = 64291968. Its totient is φ = 48590080.

The previous prime is 56178389. The next prime is 56178403. The reversal of 56178397 is 79387165.

It is not a de Polignac number, because 56178397 - 2³ = 56178389 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 (56178337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58473 + ... + 59425.

It is an arithmetic number, because the mean of its divisors is an integer number (4018248).

Almost surely, 2^56178397 is an apocalyptic number.

It is an amenable number.

56178397 is a deficient number, since it is larger than the sum of its proper divisors (8113571).

56178397 is a wasteful number, since it uses less digits than its factorization.

56178397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its digits is 317520, while the sum is 46.

The square root of 56178397 is about 7495.2249465910. The cubic root of 56178397 is about 382.9920692252.

The spelling of 56178397 in words is "fifty-six million, one hundred seventy-eight thousand, three hundred ninety-seven".