56816397 has 80 divisors (see below), whose sum is σ = 102034944. Its totient is φ = 31363200.

The previous prime is 56816369. The next prime is 56816399. The reversal of 56816397 is 79361865.

It is a happy number.

56816397 is a `hidden beast` number, since 5 + 6 + 8 + 1 + 639 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-56816397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56816399) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1832772 + ... + 1832802.

Almost surely, 2^56816397 is an apocalyptic number.

It is an amenable number.

56816397 is a deficient number, since it is larger than the sum of its proper divisors (45218547).

56816397 is a wasteful number, since it uses less digits than its factorization.

56816397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 62 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 56816397 is about 7537.6652220698. The cubic root of 56816397 is about 384.4364544215.

The spelling of 56816397 in words is "fifty-six million, eight hundred sixteen thousand, three hundred ninety-seven".