220745856 has 32 divisors (see below), whose sum is σ = 586357200. Its totient is φ = 73581824.

The previous prime is 220745851. The next prime is 220745891. The reversal of 220745856 is 658547022.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (220745851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287046 + ... + 287813.

Almost surely, 2^220745856 is an apocalyptic number.

It is an amenable number.

220745856 is an abundant number, since it is smaller than the sum of its proper divisors (365611344).

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

220745856 is an equidigital number, since it uses as much as digits as its factorization.

220745856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574876 (or 574864 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 220745856 is about 14857.5185007457. The cubic root of 220745856 is about 604.3625150071.

The spelling of 220745856 in words is "two hundred twenty million, seven hundred forty-five thousand, eight hundred fifty-six".