220391856 has 60 divisors (see below), whose sum is σ = 631152808. Its totient is φ = 71753472.

The previous prime is 220391827. The next prime is 220391879. The reversal of 220391856 is 658193022.

It is a super-2 number, since 2×220391856² = 97145140382249472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 220391856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11605 + ... + 23988.

Almost surely, 2^220391856 is an apocalyptic number.

It is an amenable number.

220391856 is an abundant number, since it is smaller than the sum of its proper divisors (410760952).

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

220391856 is a wasteful number, since it uses less digits than its factorization.

220391856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35650 (or 35641 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 220391856 is about 14845.6005604354. The cubic root of 220391856 is about 604.0392793484.

The spelling of 220391856 in words is "two hundred twenty million, three hundred ninety-one thousand, eight hundred fifty-six".