138586790 has 8 divisors (see below), whose sum is σ = 249456240. Its totient is φ = 55434712.

The previous prime is 138586751. The next prime is 138586801. The reversal of 138586790 is 97685831.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6929330 + ... + 6929349.

It is an arithmetic number, because the mean of its divisors is an integer number (31182030).

Almost surely, 2^138586790 is an apocalyptic number.

138586790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138586790 is a deficient number, since it is larger than the sum of its proper divisors (110869450).

138586790 is a wasteful number, since it uses less digits than its factorization.

138586790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13858686.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 138586790 is about 11772.2890722238. The cubic root of 138586790 is about 517.4963351666.

The spelling of 138586790 in words is "one hundred thirty-eight million, five hundred eighty-six thousand, seven hundred ninety".