56399310 has 72 divisors (see below), whose sum is σ = 161211960. Its totient is φ = 13669920.

The previous prime is 56399297. The next prime is 56399311. The reversal of 56399310 is 1399365.

56399310 is a `hidden beast` number, since 5 + 639 + 9 + 3 + 10 = 666.

It is a super-2 number, since 2×56399310² = 6361764336952200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56399311) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8301 + ... + 13479.

It is an arithmetic number, because the mean of its divisors is an integer number (2239055).

Almost surely, 2^56399310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56399310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80605980).

56399310 is an abundant number, since it is smaller than the sum of its proper divisors (104812650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56399310 is a wasteful number, since it uses less digits than its factorization.

56399310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5200 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 56399310 is about 7509.9474032779. The cubic root of 56399310 is about 383.4934319705.

Subtracting from 56399310 its reverse (1399365), we obtain a palindrome (54999945).

The spelling of 56399310 in words is "fifty-six million, three hundred ninety-nine thousand, three hundred ten".