138869286 has 8 divisors (see below), whose sum is σ = 277738584. Its totient is φ = 46289760.

The previous prime is 138869279. The next prime is 138869321. The reversal of 138869286 is 682968831.

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

138869286 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11572435 + ... + 11572446.

It is an arithmetic number, because the mean of its divisors is an integer number (34717323).

Almost surely, 2^138869286 is an apocalyptic number.

138869286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138869286 is a wasteful number, since it uses less digits than its factorization.

138869286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23144886.

The product of its digits is 995328, while the sum is 51.

The square root of 138869286 is about 11784.2813102879. The cubic root of 138869286 is about 517.8477188859.

The spelling of 138869286 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, two hundred eighty-six".