2188838730 has 32 divisors (see below), whose sum is σ = 5657307264. Its totient is φ = 538790976.

The previous prime is 2188838693. The next prime is 2188838749. The reversal of 2188838730 is 378388812.

It is a self number, because there is not a number n which added to its sum of digits gives 2188838730.

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, 2805814 + ... + 2806593.

It is an arithmetic number, because the mean of its divisors is an integer number (176790852).

Almost surely, 2^2188838730 is an apocalyptic number.

2188838730 is an abundant number, since it is smaller than the sum of its proper divisors (3468468534).

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

2188838730 is a wasteful number, since it uses less digits than its factorization.

2188838730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612430.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 2188838730 is about 46785.0267713934. The cubic root of 2188838730 is about 1298.3882847030.

The spelling of 2188838730 in words is "two billion, one hundred eighty-eight million, eight hundred thirty-eight thousand, seven hundred thirty".