138368286 has 48 divisors (see below), whose sum is σ = 344039904. Its totient is φ = 39370752.

The previous prime is 138368273. The next prime is 138368291. The reversal of 138368286 is 682863831.

138368286 is a `hidden beast` number, since 1 + 3 + 8 + 368 + 286 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30246 + ... + 34518.

It is an arithmetic number, because the mean of its divisors is an integer number (7167498).

Almost surely, 2^138368286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138368286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172019952).

138368286 is an abundant number, since it is smaller than the sum of its proper divisors (205671618).

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

138368286 is a wasteful number, since it uses less digits than its factorization.

138368286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545 (or 4542 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 138368286 is about 11763.0049732201. The cubic root of 138368286 is about 517.2242204910.

It can be divided in two parts, 13836 and 8286, that added together give a palindrome (22122).

The spelling of 138368286 in words is "one hundred thirty-eight million, three hundred sixty-eight thousand, two hundred eighty-six".