2189941888 has 16 divisors (see below), whose sum is σ = 4362775110. Its totient is φ = 1094970880.

The previous prime is 2189941877. The next prime is 2189941891. The reversal of 2189941888 is 8881499812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1921244224 + 268697664 = 43832^2 + 16392^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8554333 + ... + 8554588.

Almost surely, 2^2189941888 is an apocalyptic number.

It is an amenable number.

2189941888 is a deficient number, since it is larger than the sum of its proper divisors (2172833222).

2189941888 is an equidigital number, since it uses as much as digits as its factorization.

2189941888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17108935 (or 17108923 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 58.

The square root of 2189941888 is about 46796.8149343521. The cubic root of 2189941888 is about 1298.6063739945.

The spelling of 2189941888 in words is "two billion, one hundred eighty-nine million, nine hundred forty-one thousand, eight hundred eighty-eight".