56105640 has 48 divisors (see below), whose sum is σ = 182344500. Its totient is φ = 14961408.

The previous prime is 56105611. The next prime is 56105663. The reversal of 56105640 is 4650165.

It is a happy number.

56105640 is a `hidden beast` number, since 5 + 6 + 10 + 5 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55980324 + 125316 = 7482^2 + 354^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77565 + ... + 78284.

Almost surely, 2^56105640 is an apocalyptic number.

It is an amenable number.

56105640 is an abundant number, since it is smaller than the sum of its proper divisors (126238860).

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

56105640 is a wasteful number, since it uses less digits than its factorization.

56105640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155866 (or 155859 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56105640 is about 7490.3698173054. The cubic root of 56105640 is about 382.8266593069.

The spelling of 56105640 in words is "fifty-six million, one hundred five thousand, six hundred forty".