138826986 has 8 divisors (see below), whose sum is σ = 277653984. Its totient is φ = 46275660.

The previous prime is 138826957. The next prime is 138826991. The reversal of 138826986 is 689628831.

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

138826986 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11568910 + ... + 11568921.

It is an arithmetic number, because the mean of its divisors is an integer number (34706748).

Almost surely, 2^138826986 is an apocalyptic number.

138826986 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.

138826986 is a wasteful number, since it uses less digits than its factorization.

138826986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23137836.

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

The square root of 138826986 is about 11782.4864099221. The cubic root of 138826986 is about 517.7951342248.

The spelling of 138826986 in words is "one hundred thirty-eight million, eight hundred twenty-six thousand, nine hundred eighty-six".