56640324 has 48 divisors (see below), whose sum is σ = 143675840. Its totient is φ = 17262720.

The previous prime is 56640323. The next prime is 56640347. The reversal of 56640324 is 42304665.

It is a junction number, because it is equal to n+sod(n) for n = 56640291 and 56640300.

It is not an unprimeable number, because it can be changed into a prime (56640323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15339 + ... + 18669.

Almost surely, 2^56640324 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 56640324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71837920).

56640324 is an abundant number, since it is smaller than the sum of its proper divisors (87035516).

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

56640324 is a wasteful number, since it uses less digits than its factorization.

56640324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460 (or 3458 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 56640324 is about 7525.9766143671. The cubic root of 56640324 is about 384.0389229209.

Adding to 56640324 its reverse (42304665), we get a palindrome (98944989).

The spelling of 56640324 in words is "fifty-six million, six hundred forty thousand, three hundred twenty-four".