220564808 has 16 divisors (see below), whose sum is σ = 417823980. Its totient is φ = 109145088.

The previous prime is 220564801. The next prime is 220564867. The reversal of 220564808 is 808465022.

It can be written as a sum of positive squares in 2 ways, for example, as 195384484 + 25180324 = 13978^2 + 5018^2 .

It is not an unprimeable number, because it can be changed into a prime (220564801) 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, 141341 + ... + 142892.

Almost surely, 2^220564808 is an apocalyptic number.

It is an amenable number.

220564808 is a deficient number, since it is larger than the sum of its proper divisors (197259172).

220564808 is a wasteful number, since it uses less digits than its factorization.

220564808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284336 (or 284332 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 220564808 is about 14851.4244434667. The cubic root of 220564808 is about 604.1972441779.

The spelling of 220564808 in words is "two hundred twenty million, five hundred sixty-four thousand, eight hundred eight".