138333680 has 40 divisors (see below), whose sum is σ = 338557200. Its totient is φ = 52420608.

The previous prime is 138333673. The next prime is 138333691. The reversal of 138333680 is 86333831.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 138333680.

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, 43985 + ... + 47024.

It is an arithmetic number, because the mean of its divisors is an integer number (8463930).

Almost surely, 2^138333680 is an apocalyptic number.

138333680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138333680 is an abundant number, since it is smaller than the sum of its proper divisors (200223520).

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

138333680 is a wasteful number, since it uses less digits than its factorization.

138333680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91041 (or 91035 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 138333680 is about 11761.5339135676. The cubic root of 138333680 is about 517.1810975224.

The spelling of 138333680 in words is "one hundred thirty-eight million, three hundred thirty-three thousand, six hundred eighty".