138885330 has 16 divisors (see below), whose sum is σ = 333324864. Its totient is φ = 37036080.

The previous prime is 138885323. The next prime is 138885343. The reversal of 138885330 is 33588831.

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, 2314726 + ... + 2314785.

It is an arithmetic number, because the mean of its divisors is an integer number (20832804).

Almost surely, 2^138885330 is an apocalyptic number.

138885330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138885330 is an abundant number, since it is smaller than the sum of its proper divisors (194439534).

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

138885330 is a wasteful number, since it uses less digits than its factorization.

138885330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629521.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 138885330 is about 11784.9620279405. The cubic root of 138885330 is about 517.8676609698.

The spelling of 138885330 in words is "one hundred thirty-eight million, eight hundred eighty-five thousand, three hundred thirty".