220857930 has 48 divisors (see below), whose sum is σ = 581518080. Its totient is φ = 58148064.

The previous prime is 220857911. The next prime is 220857977. The reversal of 220857930 is 39758022.

It is a happy number.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 8422 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (12114960).

Almost surely, 2^220857930 is an apocalyptic number.

220857930 is an abundant number, since it is smaller than the sum of its proper divisors (360660150).

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

220857930 is a wasteful number, since it uses less digits than its factorization.

220857930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31155 (or 31152 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 220857930 is about 14861.2896479411. The cubic root of 220857930 is about 604.4647771984.

The spelling of 220857930 in words is "two hundred twenty million, eight hundred fifty-seven thousand, nine hundred thirty".