220917620 has 96 divisors (see below), whose sum is σ = 582543360. Its totient is φ = 68365440.

The previous prime is 220917611. The next prime is 220917623. The reversal of 220917620 is 26719022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220917623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256751 + ... + 257609.

It is an arithmetic number, because the mean of its divisors is an integer number (6068160).

Almost surely, 2^220917620 is an apocalyptic number.

220917620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220917620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291271680).

220917620 is an abundant number, since it is smaller than the sum of its proper divisors (361625740).

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

220917620 is a wasteful number, since it uses less digits than its factorization.

220917620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 220917620 is about 14863.2977498266. The cubic root of 220917620 is about 604.5192273641.

The spelling of 220917620 in words is "two hundred twenty million, nine hundred seventeen thousand, six hundred twenty".