56640480 has 192 divisors, whose sum is σ = 199402560. Its totient is φ = 13418496.

The previous prime is 56640473. The next prime is 56640491. The reversal of 56640480 is 8404665.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180804 + ... + 181116.

It is an arithmetic number, because the mean of its divisors is an integer number (1038555).

Almost surely, 2^56640480 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 56640480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99701280).

56640480 is an abundant number, since it is smaller than the sum of its proper divisors (142762080).

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

56640480 is a wasteful number, since it uses less digits than its factorization.

56640480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 56640480 is about 7525.9869784634. The cubic root of 56640480 is about 384.0392754967.

The spelling of 56640480 in words is "fifty-six million, six hundred forty thousand, four hundred eighty".