2118090128 has 120 divisors (see below), whose sum is σ = 5289750720. Its totient is φ = 798163200.

The previous prime is 2118090127. The next prime is 2118090187. The reversal of 2118090128 is 8210908112.

It is a junction number, because it is equal to n+sod(n) for n = 2118090094 and 2118090103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118090127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1183058 + ... + 1184846.

It is an arithmetic number, because the mean of its divisors is an integer number (44081256).

Almost surely, 2^2118090128 is an apocalyptic number.

2118090128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118090128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2644875360).

2118090128 is an abundant number, since it is smaller than the sum of its proper divisors (3171660592).

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

2118090128 is a wasteful number, since it uses less digits than its factorization.

2118090128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 2118090128 is about 46022.7131751269. The cubic root of 2118090128 is about 1284.2457741953.

The spelling of 2118090128 in words is "two billion, one hundred eighteen million, ninety thousand, one hundred twenty-eight".