138282018 has 24 divisors (see below), whose sum is σ = 321718032. Its totient is φ = 39509064.

The previous prime is 138282013. The next prime is 138282047. The reversal of 138282018 is 810282831.

It is a self number, because there is not a number n which added to its sum of digits gives 138282018.

It is not an unprimeable number, because it can be changed into a prime (138282013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234880 + ... + 235467.

It is an arithmetic number, because the mean of its divisors is an integer number (13404918).

Almost surely, 2^138282018 is an apocalyptic number.

138282018 is an abundant number, since it is smaller than the sum of its proper divisors (183436014).

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

138282018 is a wasteful number, since it uses less digits than its factorization.

138282018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470366 (or 470359 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 138282018 is about 11759.3374813380. The cubic root of 138282018 is about 517.1167074749.

The spelling of 138282018 in words is "one hundred thirty-eight million, two hundred eighty-two thousand, eighteen".