220402768 has 20 divisors (see below), whose sum is σ = 432882388. Its totient is φ = 108691200.

The previous prime is 220402753. The next prime is 220402769. The reversal of 220402768 is 867204022.

It can be written as a sum of positive squares in 2 ways, for example, as 159062544 + 61340224 = 12612^2 + 7832^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220402769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93183 + ... + 95518.

Almost surely, 2^220402768 is an apocalyptic number.

It is an amenable number.

220402768 is a deficient number, since it is larger than the sum of its proper divisors (212479620).

220402768 is a wasteful number, since it uses less digits than its factorization.

220402768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188782 (or 188776 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 220402768 is about 14845.9680721737. The cubic root of 220402768 is about 604.0492482101.

The spelling of 220402768 in words is "two hundred twenty million, four hundred two thousand, seven hundred sixty-eight".