220281620 has 24 divisors (see below), whose sum is σ = 498175944. Its totient is φ = 81334656.

The previous prime is 220281619. The next prime is 220281641. The reversal of 220281620 is 26182022.

It can be written as a sum of positive squares in 4 ways, for example, as 174724 + 220106896 = 418^2 + 14836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423359 + ... + 423878.

It is an arithmetic number, because the mean of its divisors is an integer number (20757331).

Almost surely, 2^220281620 is an apocalyptic number.

220281620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220281620 is an abundant number, since it is smaller than the sum of its proper divisors (277894324).

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

220281620 is a wasteful number, since it uses less digits than its factorization.

220281620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847259 (or 847257 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 220281620 is about 14841.8873462912. The cubic root of 220281620 is about 603.9385527303.

The spelling of 220281620 in words is "two hundred twenty million, two hundred eighty-one thousand, six hundred twenty".