220893906 has 32 divisors (see below), whose sum is σ = 449608320. Its totient is φ = 72338816.

The previous prime is 220893859. The next prime is 220893919. The reversal of 220893906 is 609398022.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 87940 + ... + 90416.

It is an arithmetic number, because the mean of its divisors is an integer number (14050260).

Almost surely, 2^220893906 is an apocalyptic number.

It is a pronic number, being equal to 14862×14863.

220893906 is an abundant number, since it is smaller than the sum of its proper divisors (228714414).

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

220893906 is a wasteful number, since it uses less digits than its factorization.

220893906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 220893906 is about 14862.4999915896. The cubic root of 220893906 is about 604.4975962512.

The spelling of 220893906 in words is "two hundred twenty million, eight hundred ninety-three thousand, nine hundred six".