2209985720 has 64 divisors (see below), whose sum is σ = 5305370400. Its totient is φ = 825610240.

The previous prime is 2209985719. The next prime is 2209985749. The reversal of 2209985720 is 275899022.

2209985720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76676 + ... + 101484.

Almost surely, 2^2209985720 is an apocalyptic number.

2209985720 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 2209985720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2652685200).

2209985720 is an abundant number, since it is smaller than the sum of its proper divisors (3095384680).

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

2209985720 is a wasteful number, since it uses less digits than its factorization.

2209985720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24968 (or 24964 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 2209985720 is about 47010.4852134074. The cubic root of 2209985720 is about 1302.5562562047.

The spelling of 2209985720 in words is "two billion, two hundred nine million, nine hundred eighty-five thousand, seven hundred twenty".