2138972876 has 12 divisors (see below), whose sum is σ = 3759694008. Its totient is φ = 1064774592.

The previous prime is 2138972821. The next prime is 2138972893. The reversal of 2138972876 is 6782798312.

It is a super-2 number, since 2×2138972876² = 9150409928527422752, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1176941 + ... + 1178756.

It is an arithmetic number, because the mean of its divisors is an integer number (313307834).

Almost surely, 2^2138972876 is an apocalyptic number.

It is an amenable number.

2138972876 is a deficient number, since it is larger than the sum of its proper divisors (1620721132).

2138972876 is a wasteful number, since it uses less digits than its factorization.

2138972876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355928 (or 2355926 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 2138972876 is about 46249.0310817427. The cubic root of 2138972876 is about 1288.4525394049.

The spelling of 2138972876 in words is "two billion, one hundred thirty-eight million, nine hundred seventy-two thousand, eight hundred seventy-six".