56646040 has 64 divisors (see below), whose sum is σ = 147238560. Its totient is φ = 19384320.

The previous prime is 56646017. The next prime is 56646041. The reversal of 56646040 is 4064665.

It is a junction number, because it is equal to n+sod(n) for n = 56645993 and 56646011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56646041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3694 + ... + 11266.

Almost surely, 2^56646040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56646040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73619280).

56646040 is an abundant number, since it is smaller than the sum of its proper divisors (90592520).

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

56646040 is a wasteful number, since it uses less digits than its factorization.

56646040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612 (or 7608 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 56646040 is about 7526.3563561660. The cubic root of 56646040 is about 384.0518412359.

The spelling of 56646040 in words is "fifty-six million, six hundred forty-six thousand, forty".