220581904 has 45 divisors (see below), whose sum is σ = 442261407. Its totient is φ = 106577952.

The previous prime is 220581863. The next prime is 220581923. The reversal of 220581904 is 409185022.

The square root of 220581904 is 14852.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2792137 + ... + 2792215.

Almost surely, 2^220581904 is an apocalyptic number.

220581904 is the 14852-nd square number.

It is an amenable number.

220581904 is an abundant number, since it is smaller than the sum of its proper divisors (221679503).

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

220581904 is an frugal number, since it uses more digits than its factorization.

220581904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The cubic root of 220581904 is about 604.2128542372.

The spelling of 220581904 in words is "two hundred twenty million, five hundred eighty-one thousand, nine hundred four".