220797668 has 24 divisors (see below), whose sum is σ = 475564992. Its totient is φ = 87348384.

The previous prime is 220797667. The next prime is 220797691. The reversal of 220797668 is 866797022.

It is a super-2 number, since 2×220797668² = 97503220388476448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (220797667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302930 + ... + 303657.

It is an arithmetic number, because the mean of its divisors is an integer number (19815208).

Almost surely, 2^220797668 is an apocalyptic number.

220797668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

220797668 is an abundant number, since it is smaller than the sum of its proper divisors (254767324).

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

220797668 is a wasteful number, since it uses less digits than its factorization.

220797668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606611 (or 606609 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 220797668 is about 14859.2620274360. The cubic root of 220797668 is about 604.4097952923.

The spelling of 220797668 in words is "two hundred twenty million, seven hundred ninety-seven thousand, six hundred sixty-eight".