2398991139 has 24 divisors (see below), whose sum is σ = 3557224944. Its totient is φ = 1557024000.

The previous prime is 2398991123. The next prime is 2398991143. The reversal of 2398991139 is 9311998932.

It is not a de Polignac number, because 2398991139 - 2⁴ = 2398991123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2398991939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174559 + ... + 187799.

It is an arithmetic number, because the mean of its divisors is an integer number (148217706).

Almost surely, 2^2398991139 is an apocalyptic number.

2398991139 is a deficient number, since it is larger than the sum of its proper divisors (1158233805).

2398991139 is a wasteful number, since it uses less digits than its factorization.

2398991139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13779 (or 13776 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 2398991139 is about 48979.4971289008. The cubic root of 2398991139 is about 1338.6782725395.

The spelling of 2398991139 in words is "two billion, three hundred ninety-eight million, nine hundred ninety-one thousand, one hundred thirty-nine".