8138889 has 24 divisors (see below), whose sum is σ = 12916800. Its totient is φ = 4897440.

The previous prime is 8138881. The next prime is 8138891. The reversal of 8138889 is 9888318.

It is not a de Polignac number, because 8138889 - 2³ = 8138881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8138881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22492 + ... + 22850.

It is an arithmetic number, because the mean of its divisors is an integer number (538200).

Almost surely, 2^8138889 is an apocalyptic number.

It is an amenable number.

8138889 is a deficient number, since it is larger than the sum of its proper divisors (4777911).

8138889 is a wasteful number, since it uses less digits than its factorization.

8138889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 8138889 is about 2852.8738142442. The cubic root of 8138889 is about 201.1507742272.

The spelling of 8138889 in words is "eight million, one hundred thirty-eight thousand, eight hundred eighty-nine".