138126286 has 8 divisors (see below), whose sum is σ = 209812320. Its totient is φ = 68188848.

The previous prime is 138126281. The next prime is 138126323. The reversal of 138126286 is 682621831.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138126281) 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, 436951 + ... + 437266.

It is an arithmetic number, because the mean of its divisors is an integer number (26226540).

Almost surely, 2^138126286 is an apocalyptic number.

138126286 is a deficient number, since it is larger than the sum of its proper divisors (71686034).

138126286 is an equidigital number, since it uses as much as digits as its factorization.

138126286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874298.

The product of its digits is 27648, while the sum is 37.

The square root of 138126286 is about 11752.7139844378. The cubic root of 138126286 is about 516.9225104503.

The spelling of 138126286 in words is "one hundred thirty-eight million, one hundred twenty-six thousand, two hundred eighty-six".