2138243829 has 32 divisors (see below), whose sum is σ = 3028260864. Its totient is φ = 1339208640.

The previous prime is 2138243791. The next prime is 2138243837. The reversal of 2138243829 is 9283428312.

It is not a de Polignac number, because 2138243829 - 2²⁰ = 2137195253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138243329) 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 31 ways as a sum of consecutive naturals, for example, 2916747 + ... + 2917479.

It is an arithmetic number, because the mean of its divisors is an integer number (94633152).

Almost surely, 2^2138243829 is an apocalyptic number.

It is an amenable number.

2138243829 is a deficient number, since it is larger than the sum of its proper divisors (890017035).

2138243829 is a wasteful number, since it uses less digits than its factorization.

2138243829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457.

The product of its digits is 165888, while the sum is 42.

The square root of 2138243829 is about 46241.1486557157. The cubic root of 2138243829 is about 1288.3061374860.

The spelling of 2138243829 in words is "two billion, one hundred thirty-eight million, two hundred forty-three thousand, eight hundred twenty-nine".