220870494 has 72 divisors (see below), whose sum is σ = 548806752. Its totient is φ = 63947520.

The previous prime is 220870487. The next prime is 220870513. The reversal of 220870494 is 494078022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49579 + ... + 53849.

It is an arithmetic number, because the mean of its divisors is an integer number (7622316).

Almost surely, 2^220870494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220870494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274403376).

220870494 is an abundant number, since it is smaller than the sum of its proper divisors (327936258).

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

220870494 is a wasteful number, since it uses less digits than its factorization.

220870494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 220870494 is about 14861.7123508699. The cubic root of 220870494 is about 604.4762390938.

The spelling of 220870494 in words is "two hundred twenty million, eight hundred seventy thousand, four hundred ninety-four".