220604004 has 18 divisors (see below), whose sum is σ = 557637990. Its totient is φ = 73534656.

The previous prime is 220603993. The next prime is 220604011. The reversal of 220604004 is 400406022.

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 28836900 = 13848^2 + 5370^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×220604004² = 97332253161664032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3063909 + ... + 3063980.

Almost surely, 2^220604004 is an apocalyptic number.

It is an amenable number.

220604004 is an abundant number, since it is smaller than the sum of its proper divisors (337033986).

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

220604004 is a wasteful number, since it uses less digits than its factorization.

220604004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127899 (or 6127894 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220604004 is about 14852.7439889066. The cubic root of 220604004 is about 604.2330321665.

The spelling of 220604004 in words is "two hundred twenty million, six hundred four thousand, four".