220236804 has 18 divisors (see below), whose sum is σ = 556709790. Its totient is φ = 73412256.

The previous prime is 220236781. The next prime is 220236811. The reversal of 220236804 is 408632022.

It can be written as a sum of positive squares in only one way, i.e., 208744704 + 11492100 = 14448^2 + 3390^2 .

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

It is a super-2 number, since 2×220236804² = 97008499672268832, which contains 22 as substring.

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, 3058809 + ... + 3058880.

Almost surely, 2^220236804 is an apocalyptic number.

It is an amenable number.

220236804 is an abundant number, since it is smaller than the sum of its proper divisors (336472986).

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

220236804 is a wasteful number, since it uses less digits than its factorization.

220236804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117699 (or 6117694 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 220236804 is about 14840.3774884603. The cubic root of 220236804 is about 603.8975931230.

Adding to 220236804 its reverse (408632022), we get a palindrome (628868826).

The spelling of 220236804 in words is "two hundred twenty million, two hundred thirty-six thousand, eight hundred four".