2131998028 has 12 divisors (see below), whose sum is σ = 3733506000. Its totient is φ = 1065282032.

The previous prime is 2131998013. The next prime is 2131998031. The reversal of 2131998028 is 8208991312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172528 + ... + 184471.

It is an arithmetic number, because the mean of its divisors is an integer number (311125500).

Almost surely, 2^2131998028 is an apocalyptic number.

It is an amenable number.

2131998028 is a deficient number, since it is larger than the sum of its proper divisors (1601507972).

2131998028 is a wasteful number, since it uses less digits than its factorization.

2131998028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358496 (or 358494 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 2131998028 is about 46173.5641682554. The cubic root of 2131998028 is about 1287.0505352651.

The spelling of 2131998028 in words is "two billion, one hundred thirty-one million, nine hundred ninety-eight thousand, twenty-eight".