2180080720 has 20 divisors (see below), whose sum is σ = 5068687860. Its totient is φ = 872032256.

The previous prime is 2180080709. The next prime is 2180080807. The reversal of 2180080720 is 270800812.

It can be written as a sum of positive squares in 2 ways, for example, as 1509477904 + 670602816 = 38852^2 + 25896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13625425 + ... + 13625584.

It is an arithmetic number, because the mean of its divisors is an integer number (253434393).

Almost surely, 2^2180080720 is an apocalyptic number.

2180080720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2180080720 is an abundant number, since it is smaller than the sum of its proper divisors (2888607140).

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

2180080720 is a wasteful number, since it uses less digits than its factorization.

2180080720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27251022 (or 27251016 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2180080720 is about 46691.3345279400. The cubic root of 2180080720 is about 1296.6542605442.

The spelling of 2180080720 in words is "two billion, one hundred eighty million, eighty thousand, seven hundred twenty".