2128911740 has 24 divisors (see below), whose sum is σ = 4665094560. Its totient is φ = 814539968.

The previous prime is 2128911739. The next prime is 2128911761. The reversal of 2128911740 is 471198212.

It is a self number, because there is not a number n which added to its sum of digits gives 2128911740.

It is a congruent number.

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, 2313575 + ... + 2314494.

It is an arithmetic number, because the mean of its divisors is an integer number (194378940).

Almost surely, 2^2128911740 is an apocalyptic number.

2128911740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2128911740 is an abundant number, since it is smaller than the sum of its proper divisors (2536182820).

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

2128911740 is a wasteful number, since it uses less digits than its factorization.

2128911740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628101 (or 4628099 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2128911740 is about 46140.1315559460. The cubic root of 2128911740 is about 1286.4291890223.

The spelling of 2128911740 in words is "two billion, one hundred twenty-eight million, nine hundred eleven thousand, seven hundred forty".