138865196 has 12 divisors (see below), whose sum is σ = 248941560. Its totient is φ = 67739040.

The previous prime is 138865193. The next prime is 138865217. The reversal of 138865196 is 691568831.

It is a self number, because there is not a number n which added to its sum of digits gives 138865196.

It is not an unprimeable number, because it can be changed into a prime (138865193) 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, 423206 + ... + 423533.

It is an arithmetic number, because the mean of its divisors is an integer number (20745130).

Almost surely, 2^138865196 is an apocalyptic number.

It is an amenable number.

138865196 is a deficient number, since it is larger than the sum of its proper divisors (110076364).

138865196 is a wasteful number, since it uses less digits than its factorization.

138865196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846784 (or 846782 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 138865196 is about 11784.1077727590. The cubic root of 138865196 is about 517.8426349252.

The spelling of 138865196 in words is "one hundred thirty-eight million, eight hundred sixty-five thousand, one hundred ninety-six".