220642444 has 48 divisors (see below), whose sum is σ = 429004800. Its totient is φ = 98461440.

The previous prime is 220642423. The next prime is 220642447. The reversal of 220642444 is 444246022.

220642444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (220642447) 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, 989317 + ... + 989539.

It is an arithmetic number, because the mean of its divisors is an integer number (8937600).

Almost surely, 2^220642444 is an apocalyptic number.

It is an amenable number.

220642444 is a deficient number, since it is larger than the sum of its proper divisors (208362356).

220642444 is a wasteful number, since it uses less digits than its factorization.

220642444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 220642444 is about 14854.0379695220. The cubic root of 220642444 is about 604.2681257707.

Adding to 220642444 its reverse (444246022), we get a palindrome (664888466).

The spelling of 220642444 in words is "two hundred twenty million, six hundred forty-two thousand, four hundred forty-four".