3138889 has 4 divisors (see below), whose sum is σ = 3380356. Its totient is φ = 2897424.

The previous prime is 3138881. The next prime is 3138893. The reversal of 3138889 is 9888313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1428025 + 1710864 = 1195^2 + 1308^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138889 - 2³ = 3138881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120714 + ... + 120739.

It is an arithmetic number, because the mean of its divisors is an integer number (845089).

Almost surely, 2^3138889 is an apocalyptic number.

It is an amenable number.

3138889 is a deficient number, since it is larger than the sum of its proper divisors (241467).

3138889 is a wasteful number, since it uses less digits than its factorization.

3138889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241466.

The product of its digits is 41472, while the sum is 40.

The square root of 3138889 is about 1771.6910001465. The cubic root of 3138889 is about 146.4171624549.

The spelling of 3138889 in words is "three million, one hundred thirty-eight thousand, eight hundred eighty-nine".