220668224 has 28 divisors (see below), whose sum is σ = 500445024. Its totient is φ = 94571904.

The previous prime is 220668209. The next prime is 220668271. The reversal of 220668224 is 422866022.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245834 + ... + 246729.

Almost surely, 2^220668224 is an apocalyptic number.

It is an amenable number.

220668224 is an abundant number, since it is smaller than the sum of its proper divisors (279776800).

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

220668224 is an equidigital number, since it uses as much as digits as its factorization.

220668224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492582 (or 492572 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 220668224 is about 14854.9057216800. The cubic root of 220668224 is about 604.2916592083.

The spelling of 220668224 in words is "two hundred twenty million, six hundred sixty-eight thousand, two hundred twenty-four".