2188997420 has 36 divisors (see below), whose sum is σ = 4747708224. Its totient is φ = 846902880.

The previous prime is 2188997399. The next prime is 2188997443. The reversal of 2188997420 is 247998812.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1164041 + ... + 1165919.

It is an arithmetic number, because the mean of its divisors is an integer number (131880784).

Almost surely, 2^2188997420 is an apocalyptic number.

2188997420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188997420 is an abundant number, since it is smaller than the sum of its proper divisors (2558710804).

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

2188997420 is an equidigital number, since it uses as much as digits as its factorization.

2188997420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3798 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 2188997420 is about 46786.7226892417. The cubic root of 2188997420 is about 1298.4196615019.

The spelling of 2188997420 in words is "two billion, one hundred eighty-eight million, nine hundred ninety-seven thousand, four hundred twenty".