220866808 has 8 divisors (see below), whose sum is σ = 414125280. Its totient is φ = 110433400.

The previous prime is 220866803. The next prime is 220866817. The reversal of 220866808 is 808668022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×220866808² = 97564293752217728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220866803) 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 as a sum of consecutive naturals, namely, 13804168 + ... + 13804183.

It is an arithmetic number, because the mean of its divisors is an integer number (51765660).

Almost surely, 2^220866808 is an apocalyptic number.

It is an amenable number.

220866808 is a deficient number, since it is larger than the sum of its proper divisors (193258472).

220866808 is a wasteful number, since it uses less digits than its factorization.

220866808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27608357 (or 27608353 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 220866808 is about 14861.5883404164. The cubic root of 220866808 is about 604.4728764720.

The spelling of 220866808 in words is "two hundred twenty million, eight hundred sixty-six thousand, eight hundred eight".