56399667 has 16 divisors (see below), whose sum is σ = 76218240. Its totient is φ = 37094400.

The previous prime is 56399663. The next prime is 56399683. The reversal of 56399667 is 76699365.

It is not a de Polignac number, because 56399667 - 2² = 56399663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56399663) 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, 87667 + ... + 88307.

It is an arithmetic number, because the mean of its divisors is an integer number (4763640).

Almost surely, 2^56399667 is an apocalyptic number.

56399667 is a deficient number, since it is larger than the sum of its proper divisors (19818573).

56399667 is a wasteful number, since it uses less digits than its factorization.

56399667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its digits is 1837080, while the sum is 51.

The square root of 56399667 is about 7509.9711717156. The cubic root of 56399667 is about 383.4942411226.

The spelling of 56399667 in words is "fifty-six million, three hundred ninety-nine thousand, six hundred sixty-seven".