220779216 has 80 divisors (see below), whose sum is σ = 724259200. Its totient is φ = 63078912.

The previous prime is 220779197. The next prime is 220779227. The reversal of 220779216 is 612977022.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33481 + ... + 39528.

It is an arithmetic number, because the mean of its divisors is an integer number (9053240).

Almost surely, 2^220779216 is an apocalyptic number.

It is an amenable number.

220779216 is an abundant number, since it is smaller than the sum of its proper divisors (503479984).

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

220779216 is a wasteful number, since it uses less digits than its factorization.

220779216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73033 (or 73021 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 220779216 is about 14858.6411222561. The cubic root of 220779216 is about 604.3929580368.

The spelling of 220779216 in words is "two hundred twenty million, seven hundred seventy-nine thousand, two hundred sixteen".