56471940 has 72 divisors (see below), whose sum is σ = 195773760. Its totient is φ = 12907584.

The previous prime is 56471929. The next prime is 56471951. The reversal of 56471940 is 4917465.

56471940 = 400² + 401² + ... + 615².

56471940 is a `hidden beast` number, since 5 + 647 + 1 + 9 + 4 + 0 = 666.

56471940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56471929) and next prime (56471951).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56471895 and 56471904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21150 + ... + 23669.

It is an arithmetic number, because the mean of its divisors is an integer number (2719080).

Almost surely, 2^56471940 is an apocalyptic number.

It is an amenable number.

56471940 is an abundant number, since it is smaller than the sum of its proper divisors (139301820).

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

56471940 is a wasteful number, since it uses less digits than its factorization.

56471940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44841 (or 44836 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 56471940 is about 7514.7814339474. The cubic root of 56471940 is about 383.6579799662.

The spelling of 56471940 in words is "fifty-six million, four hundred seventy-one thousand, nine hundred forty".