220520604 has 24 divisors (see below), whose sum is σ = 521797248. Its totient is φ = 72471280.

The previous prime is 220520603. The next prime is 220520609. The reversal of 220520604 is 406025022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220520603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128562 + ... + 130265.

It is an arithmetic number, because the mean of its divisors is an integer number (21741552).

Almost surely, 2^220520604 is an apocalyptic number.

It is an amenable number.

220520604 is an abundant number, since it is smaller than the sum of its proper divisors (301276644).

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

220520604 is a wasteful number, since it uses less digits than its factorization.

220520604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258905 (or 258903 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 220520604 is about 14849.9361614789. The cubic root of 220520604 is about 604.1568785372.

Adding to 220520604 its reverse (406025022), we get a palindrome (626545626).

The spelling of 220520604 in words is "two hundred twenty million, five hundred twenty thousand, six hundred four".