2129915788 has 288 divisors, whose sum is σ = 5578191360. Its totient is φ = 687697920.

The previous prime is 2129915731. The next prime is 2129915807. The reversal of 2129915788 is 8875199212.

It is a Harshad number since it is a multiple of its sum of digits (52).

Its product of digits (725760) is a multiple of the sum of its prime divisors (162).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25661595 + ... + 25661677.

It is an arithmetic number, because the mean of its divisors is an integer number (19368720).

Almost surely, 2^2129915788 is an apocalyptic number.

2129915788 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 2129915788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2789095680).

2129915788 is an abundant number, since it is smaller than the sum of its proper divisors (3448275572).

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

2129915788 is a wasteful number, since it uses less digits than its factorization.

2129915788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 162 counting only the distinct ones).

The product of its digits is 725760, while the sum is 52.

The square root of 2129915788 is about 46151.0106931582. The cubic root of 2129915788 is about 1286.6313946261.

The spelling of 2129915788 in words is "two billion, one hundred twenty-nine million, nine hundred fifteen thousand, seven hundred eighty-eight".