138387286 has 8 divisors (see below), whose sum is σ = 214277184. Its totient is φ = 66961560.

The previous prime is 138387253. The next prime is 138387299. The reversal of 138387286 is 682783831.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115965 + ... + 1116088.

It is an arithmetic number, because the mean of its divisors is an integer number (26784648).

Almost surely, 2^138387286 is an apocalyptic number.

138387286 is a deficient number, since it is larger than the sum of its proper divisors (75889898).

138387286 is a wasteful number, since it uses less digits than its factorization.

138387286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232086.

The product of its digits is 387072, while the sum is 46.

The square root of 138387286 is about 11763.8125622606. The cubic root of 138387286 is about 517.2478935708.

The spelling of 138387286 in words is "one hundred thirty-eight million, three hundred eighty-seven thousand, two hundred eighty-six".