220942830 has 96 divisors (see below), whose sum is σ = 584630784. Its totient is φ = 53330112.

The previous prime is 220942819. The next prime is 220942867. The reversal of 220942830 is 38249022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248647 + ... + 249533.

It is an arithmetic number, because the mean of its divisors is an integer number (6089904).

Almost surely, 2^220942830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220942830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292315392).

220942830 is an abundant number, since it is smaller than the sum of its proper divisors (363687954).

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

220942830 is a wasteful number, since it uses less digits than its factorization.

220942830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 220942830 is about 14864.1457877673. The cubic root of 220942830 is about 604.5422213804.

The spelling of 220942830 in words is "two hundred twenty million, nine hundred forty-two thousand, eight hundred thirty".