2129239872 has 196 divisors, whose sum is σ = 6476366016. Its totient is φ = 693930240.

The previous prime is 2129239841. The next prime is 2129239891. The reversal of 2129239872 is 2789329212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2192347 + ... + 2193317.

Almost surely, 2^2129239872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2129239872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3238183008).

2129239872 is an abundant number, since it is smaller than the sum of its proper divisors (4347126144).

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

2129239872 is an frugal number, since it uses more digits than its factorization.

2129239872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1023 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2129239872 is about 46143.6872388846. The cubic root of 2129239872 is about 1286.4952786413.

The spelling of 2129239872 in words is "two billion, one hundred twenty-nine million, two hundred thirty-nine thousand, eight hundred seventy-two".