220728922 has 4 divisors (see below), whose sum is σ = 331093386. Its totient is φ = 110364460.

The previous prime is 220728919. The next prime is 220728943. The reversal of 220728922 is 229827022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 196532361 + 24196561 = 14019^2 + 4919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55182229 + ... + 55182232.

Almost surely, 2^220728922 is an apocalyptic number.

220728922 is a deficient number, since it is larger than the sum of its proper divisors (110364464).

220728922 is a wasteful number, since it uses less digits than its factorization.

220728922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110364463.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 220728922 is about 14856.9486099939. The cubic root of 220728922 is about 604.3470605282.

The spelling of 220728922 in words is "two hundred twenty million, seven hundred twenty-eight thousand, nine hundred twenty-two".