56320218 has 64 divisors (see below), whose sum is σ = 139536000. Its totient is φ = 16733952.

The previous prime is 56320213. The next prime is 56320247. The reversal of 56320218 is 81202365.

56320218 is a `hidden beast` number, since 5 + 632 + 0 + 21 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 56320191 and 56320200.

It is not an unprimeable number, because it can be changed into a prime (56320213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15828 + ... + 19056.

It is an arithmetic number, because the mean of its divisors is an integer number (2180250).

Almost surely, 2^56320218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56320218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69768000).

56320218 is an abundant number, since it is smaller than the sum of its proper divisors (83215782).

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

56320218 is a wasteful number, since it uses less digits than its factorization.

56320218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276 (or 3270 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 56320218 is about 7504.6797400022. The cubic root of 56320218 is about 383.3140831333.

The spelling of 56320218 in words is "fifty-six million, three hundred twenty thousand, two hundred eighteen".