138068986 has 48 divisors (see below), whose sum is σ = 237484800. Its totient is φ = 60112800.

The previous prime is 138068969. The next prime is 138069013. The reversal of 138068986 is 689860831.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 693715 + ... + 693913.

It is an arithmetic number, because the mean of its divisors is an integer number (4947600).

Almost surely, 2^138068986 is an apocalyptic number.

138068986 is a deficient number, since it is larger than the sum of its proper divisors (99415814).

138068986 is a wasteful number, since it uses less digits than its factorization.

138068986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 138068986 is about 11750.2759967585. The cubic root of 138068986 is about 516.8510209040.

The spelling of 138068986 in words is "one hundred thirty-eight million, sixty-eight thousand, nine hundred eighty-six".