56663808 has 72 divisors (see below), whose sum is σ = 152686800. Its totient is φ = 18653184.

The previous prime is 56663801. The next prime is 56663821. The reversal of 56663808 is 80836665.

It is a self number, because there is not a number n which added to its sum of digits gives 56663808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56663801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67938 + ... + 68766.

It is an arithmetic number, because the mean of its divisors is an integer number (2120650).

Almost surely, 2^56663808 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 56663808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76343400).

56663808 is an abundant number, since it is smaller than the sum of its proper divisors (96022992).

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

56663808 is an equidigital number, since it uses as much as digits as its factorization.

56663808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 56663808 is about 7527.5366488646. The cubic root of 56663808 is about 384.0919918494.

The spelling of 56663808 in words is "fifty-six million, six hundred sixty-three thousand, eight hundred eight".