220644404 has 12 divisors (see below), whose sum is σ = 386240484. Its totient is φ = 110289984.

The previous prime is 220644401. The next prime is 220644409. The reversal of 220644404 is 404446022.

It can be written as a sum of positive squares in 2 ways, for example, as 99600400 + 121044004 = 9980^2 + 11002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220644401) 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, 14162 + ... + 25334.

It is an arithmetic number, because the mean of its divisors is an integer number (32186707).

Almost surely, 2^220644404 is an apocalyptic number.

It is an amenable number.

220644404 is a deficient number, since it is larger than the sum of its proper divisors (165596080).

220644404 is a wasteful number, since it uses less digits than its factorization.

220644404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16114 (or 16112 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 220644404 is about 14854.1039447016. The cubic root of 220644404 is about 604.2699150336.

The spelling of 220644404 in words is "two hundred twenty million, six hundred forty-four thousand, four hundred four".