2189138730 has 16 divisors (see below), whose sum is σ = 5253933024. Its totient is φ = 583770320.

The previous prime is 2189138723. The next prime is 2189138779. The reversal of 2189138730 is 378319812.

2189138730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 36485616 + ... + 36485675.

It is an arithmetic number, because the mean of its divisors is an integer number (328370814).

Almost surely, 2^2189138730 is an apocalyptic number.

2189138730 is an abundant number, since it is smaller than the sum of its proper divisors (3064794294).

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

2189138730 is a wasteful number, since it uses less digits than its factorization.

2189138730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72971301.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 2189138730 is about 46788.2328155275. The cubic root of 2189138730 is about 1298.4476005838.

The spelling of 2189138730 in words is "two billion, one hundred eighty-nine million, one hundred thirty-eight thousand, seven hundred thirty".