220446920 has 32 divisors (see below), whose sum is σ = 506563200. Its totient is φ = 86301888.

The previous prime is 220446917. The next prime is 220446937. The reversal of 220446920 is 29644022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56750 + ... + 60509.

It is an arithmetic number, because the mean of its divisors is an integer number (15830100).

Almost surely, 2^220446920 is an apocalyptic number.

220446920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220446920 is an abundant number, since it is smaller than the sum of its proper divisors (286116280).

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

220446920 is a wasteful number, since it uses less digits than its factorization.

220446920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117317 (or 117313 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 220446920 is about 14847.4550007737. The cubic root of 220446920 is about 604.0895807371.

The spelling of 220446920 in words is "two hundred twenty million, four hundred forty-six thousand, nine hundred twenty".