56304840 has 32 divisors (see below), whose sum is σ = 168914880. Its totient is φ = 15014592.

The previous prime is 56304803. The next prime is 56304877. The reversal of 56304840 is 4840365.

It is an interprime number because it is at equal distance from previous prime (56304803) and next prime (56304877).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 56304798 and 56304807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234484 + ... + 234723.

It is an arithmetic number, because the mean of its divisors is an integer number (5278590).

Almost surely, 2^56304840 is an apocalyptic number.

It is an amenable number.

56304840 is an abundant number, since it is smaller than the sum of its proper divisors (112610040).

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

56304840 is a wasteful number, since it uses less digits than its factorization.

56304840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469221 (or 469217 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 56304840 is about 7503.6551093450. The cubic root of 56304840 is about 383.2791925217.

The spelling of 56304840 in words is "fifty-six million, three hundred four thousand, eight hundred forty".