220191680 has 56 divisors (see below), whose sum is σ = 534265632. Its totient is φ = 86408192.

The previous prime is 220191677. The next prime is 220191721. The reversal of 220191680 is 86191022.

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, 10469 + ... + 23451.

Almost surely, 2^220191680 is an apocalyptic number.

220191680 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 220191680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267132816).

220191680 is an abundant number, since it is smaller than the sum of its proper divisors (314073952).

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

220191680 is a wasteful number, since it uses less digits than its factorization.

220191680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053 (or 13043 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 220191680 is about 14838.8570988469. The cubic root of 220191680 is about 603.8563464047.

The spelling of 220191680 in words is "two hundred twenty million, one hundred ninety-one thousand, six hundred eighty".