138361588 has 24 divisors (see below), whose sum is σ = 248332392. Its totient is φ = 67426944.

The previous prime is 138361579. The next prime is 138361621. The reversal of 138361588 is 885163831.

It can be written as a sum of positive squares in 4 ways, for example, as 18852964 + 119508624 = 4342^2 + 10932^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31206 + ... + 35362.

It is an arithmetic number, because the mean of its divisors is an integer number (10347183).

Almost surely, 2^138361588 is an apocalyptic number.

It is an amenable number.

138361588 is a deficient number, since it is larger than the sum of its proper divisors (109970804).

138361588 is a wasteful number, since it uses less digits than its factorization.

138361588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371 (or 4369 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 138361588 is about 11762.7202636125. The cubic root of 138361588 is about 517.2158745908.

The spelling of 138361588 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, five hundred eighty-eight".