2139802838 has 32 divisors (see below), whose sum is σ = 3639306240. Its totient is φ = 938234880.

The previous prime is 2139802829. The next prime is 2139802843. The reversal of 2139802838 is 8382089312.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 12395 + ... + 66582.

It is an arithmetic number, because the mean of its divisors is an integer number (113728320).

Almost surely, 2^2139802838 is an apocalyptic number.

2139802838 is a deficient number, since it is larger than the sum of its proper divisors (1499503402).

2139802838 is a wasteful number, since it uses less digits than its factorization.

2139802838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79052.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 2139802838 is about 46258.0029616498. The cubic root of 2139802838 is about 1288.6191658539.

The spelling of 2139802838 in words is "two billion, one hundred thirty-nine million, eight hundred two thousand, eight hundred thirty-eight".