220440904 has 32 divisors (see below), whose sum is σ = 446964480. Its totient is φ = 101526784.

The previous prime is 220440877. The next prime is 220440923. The reversal of 220440904 is 409044022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10852 + ... + 23635.

It is an arithmetic number, because the mean of its divisors is an integer number (13967640).

Almost surely, 2^220440904 is an apocalyptic number.

It is an amenable number.

220440904 is an abundant number, since it is smaller than the sum of its proper divisors (226523576).

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

220440904 is a wasteful number, since it uses less digits than its factorization.

220440904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34557 (or 34553 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 220440904 is about 14847.2524057483. The cubic root of 220440904 is about 604.0840854823.

Adding to 220440904 its reverse (409044022), we get a palindrome (629484926).

The spelling of 220440904 in words is "two hundred twenty million, four hundred forty thousand, nine hundred four".