2138889 has 12 divisors (see below), whose sum is σ = 3030704. Its totient is φ = 1341504.

The previous prime is 2138879. The next prime is 2138897. The reversal of 2138889 is 9888312.

It is not a de Polignac number, because 2138889 - 2⁹ = 2138377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367 + ... + 2100.

2^2138889 is an apocalyptic number.

It is an amenable number.

2138889 is a deficient number, since it is larger than the sum of its proper divisors (891815).

2138889 is a wasteful number, since it uses less digits than its factorization.

2138889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504 (or 2487 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 2138889 is about 1462.4941025522. The cubic root of 2138889 is about 128.8435697730.

The spelling of 2138889 in words is "two million, one hundred thirty-eight thousand, eight hundred eighty-nine".