56397330 has 128 divisors (see below), whose sum is σ = 173871360. Its totient is φ = 12856320.

The previous prime is 56397323. The next prime is 56397349. The reversal of 56397330 is 3379365.

56397330 is a `hidden beast` number, since 563 + 97 + 3 + 3 + 0 = 666.

It is a super-2 number, since 2×56397330² = 6361317662257800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49932 + ... + 51048.

It is an arithmetic number, because the mean of its divisors is an integer number (1358370).

Almost surely, 2^56397330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56397330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86935680).

56397330 is an abundant number, since it is smaller than the sum of its proper divisors (117474030).

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

56397330 is a wasteful number, since it uses less digits than its factorization.

56397330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 36.

The square root of 56397330 is about 7509.8155769633. The cubic root of 56397330 is about 383.4889441740.

It can be divided in two parts, 56 and 397330, that added together give a triangular number (397386 = T₈₉₁).

The spelling of 56397330 in words is "fifty-six million, three hundred ninety-seven thousand, three hundred thirty".