2129634872 has 8 divisors (see below), whose sum is σ = 3993065400. Its totient is φ = 1064817432.

The previous prime is 2129634853. The next prime is 2129634887. The reversal of 2129634872 is 2784369212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133102172 + ... + 133102187.

It is an arithmetic number, because the mean of its divisors is an integer number (499133175).

Almost surely, 2^2129634872 is an apocalyptic number.

It is an amenable number.

2129634872 is a deficient number, since it is larger than the sum of its proper divisors (1863430528).

2129634872 is a wasteful number, since it uses less digits than its factorization.

2129634872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266204365 (or 266204361 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 2129634872 is about 46147.9671491605. The cubic root of 2129634872 is about 1286.5748272510.

The spelling of 2129634872 in words is "two billion, one hundred twenty-nine million, six hundred thirty-four thousand, eight hundred seventy-two".