138884589 has 24 divisors (see below), whose sum is σ = 207862200. Its totient is φ = 89295360.

The previous prime is 138884587. The next prime is 138884593. The reversal of 138884589 is 985488831.

It can be written as a sum of positive squares in 4 ways, for example, as 12659364 + 126225225 = 3558^2 + 11235^2 .

It is not a de Polignac number, because 138884589 - 2¹ = 138884587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138884587) 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, 30727 + ... + 34955.

It is an arithmetic number, because the mean of its divisors is an integer number (8660925).

Almost surely, 2^138884589 is an apocalyptic number.

It is an amenable number.

138884589 is a deficient number, since it is larger than the sum of its proper divisors (68977611).

138884589 is a wasteful number, since it uses less digits than its factorization.

138884589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365 (or 4362 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 138884589 is about 11784.9305895283. The cubic root of 138884589 is about 517.8667399687.

The spelling of 138884589 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, five hundred eighty-nine".