138135284 has 24 divisors (see below), whose sum is σ = 280956480. Its totient is φ = 58196736.

The previous prime is 138135271. The next prime is 138135313. The reversal of 138135284 is 482531831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40157 + ... + 43460.

It is an arithmetic number, because the mean of its divisors is an integer number (11706520).

Almost surely, 2^138135284 is an apocalyptic number.

138135284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138135284 is an abundant number, since it is smaller than the sum of its proper divisors (142821196).

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

138135284 is a wasteful number, since it uses less digits than its factorization.

138135284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83687 (or 83685 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 138135284 is about 11753.0967834014. The cubic root of 138135284 is about 516.9337348834.

The spelling of 138135284 in words is "one hundred thirty-eight million, one hundred thirty-five thousand, two hundred eighty-four".