220220604 has 18 divisors (see below), whose sum is σ = 556668840. Its totient is φ = 73406856.

The previous prime is 220220599. The next prime is 220220641. The reversal of 220220604 is 406022022.

It is a happy number.

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

It is a super-2 number, since 2×220220604² = 96994228852249632, which contains 22 as substring.

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

It is a congruent number.

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, 3058584 + ... + 3058655.

Almost surely, 2^220220604 is an apocalyptic number.

It is an amenable number.

220220604 is an abundant number, since it is smaller than the sum of its proper divisors (336448236).

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

220220604 is a wasteful number, since it uses less digits than its factorization.

220220604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117249 (or 6117244 counting only the distinct ones).

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

The square root of 220220604 is about 14839.8316702043. The cubic root of 220220604 is about 603.8827857570.

Adding to 220220604 its reverse (406022022), we get a palindrome (626242626).

The spelling of 220220604 in words is "two hundred twenty million, two hundred twenty thousand, six hundred four".