220390618 has 32 divisors (see below), whose sum is σ = 401601024. Its totient is φ = 88549632.

The previous prime is 220390613. The next prime is 220390627. The reversal of 220390618 is 816093022.

220390618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 220390618.

It is not an unprimeable number, because it can be changed into a prime (220390613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64255 + ... + 67597.

It is an arithmetic number, because the mean of its divisors is an integer number (12550032).

Almost surely, 2^220390618 is an apocalyptic number.

220390618 is a deficient number, since it is larger than the sum of its proper divisors (181210406).

220390618 is a wasteful number, since it uses less digits than its factorization.

220390618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 220390618 is about 14845.5588645224. The cubic root of 220390618 is about 604.0381483295.

The spelling of 220390618 in words is "two hundred twenty million, three hundred ninety thousand, six hundred eighteen".