56400866 has 8 divisors (see below), whose sum is σ = 89577900. Its totient is φ = 26541568.

The previous prime is 56400863. The next prime is 56400889. The reversal of 56400866 is 66800465.

It can be written as a sum of positive squares in 2 ways, for example, as 46635241 + 9765625 = 6829^2 + 3125^2 .

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

It is not an unprimeable number, because it can be changed into a prime (56400863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829391 + ... + 829458.

Almost surely, 2^56400866 is an apocalyptic number.

56400866 is a deficient number, since it is larger than the sum of its proper divisors (33177034).

56400866 is a wasteful number, since it uses less digits than its factorization.

56400866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658868.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 56400866 is about 7510.0509984953. The cubic root of 56400866 is about 383.4969586702.

The spelling of 56400866 in words is "fifty-six million, four hundred thousand, eight hundred sixty-six".