220823790 has 96 divisors (see below), whose sum is σ = 588349440. Its totient is φ = 53000640.

The previous prime is 220823789. The next prime is 220823821. The reversal of 220823790 is 97328022.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 460771 + ... + 461249.

It is an arithmetic number, because the mean of its divisors is an integer number (6128640).

Almost surely, 2^220823790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220823790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294174720).

220823790 is an abundant number, since it is smaller than the sum of its proper divisors (367525650).

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

220823790 is a wasteful number, since it uses less digits than its factorization.

220823790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 220823790 is about 14860.1409818346. The cubic root of 220823790 is about 604.4336297380.

The spelling of 220823790 in words is "two hundred twenty million, eight hundred twenty-three thousand, seven hundred ninety".