56478591 has 24 divisors (see below), whose sum is σ = 88264176. Its totient is φ = 34594560.

The previous prime is 56478563. The next prime is 56478629. The reversal of 56478591 is 19587465.

56478591 is a `hidden beast` number, since 56 + 4 + 7 + 8 + 591 = 666.

It is not a de Polignac number, because 56478591 - 2⁷ = 56478463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56478691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27196 + ... + 29198.

It is an arithmetic number, because the mean of its divisors is an integer number (3677674).

Almost surely, 2^56478591 is an apocalyptic number.

56478591 is a deficient number, since it is larger than the sum of its proper divisors (31785585).

56478591 is a wasteful number, since it uses less digits than its factorization.

56478591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263 (or 2260 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 56478591 is about 7515.2239487589. The cubic root of 56478591 is about 383.6730411869.

The spelling of 56478591 in words is "fifty-six million, four hundred seventy-eight thousand, five hundred ninety-one".