138285586 has 8 divisors (see below), whose sum is σ = 211342284. Its totient is φ = 67838160.

The previous prime is 138285583. The next prime is 138285593. The reversal of 138285586 is 685582831.

It can be written as a sum of positive squares in 2 ways, for example, as 137334961 + 950625 = 11719^2 + 975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138285583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652185 + ... + 652396.

Almost surely, 2^138285586 is an apocalyptic number.

138285586 is a deficient number, since it is larger than the sum of its proper divisors (73056698).

138285586 is a wasteful number, since it uses less digits than its factorization.

138285586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304636.

The product of its digits is 460800, while the sum is 46.

The square root of 138285586 is about 11759.4891895864. The cubic root of 138285586 is about 517.1211550442.

It can be divided in two parts, 1382 and 85586, that added together give a palindrome (86968).

The spelling of 138285586 in words is "one hundred thirty-eight million, two hundred eighty-five thousand, five hundred eighty-six".