138338880 has 56 divisors (see below), whose sum is σ = 439228992. Its totient is φ = 36890112.

The previous prime is 138338873. The next prime is 138338887. The reversal of 138338880 is 88833831.

It is an interprime number because it is at equal distance from previous prime (138338873) and next prime (138338887).

It is not an unprimeable number, because it can be changed into a prime (138338887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71092 + ... + 73011.

Almost surely, 2^138338880 is an apocalyptic number.

138338880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138338880 is an abundant number, since it is smaller than the sum of its proper divisors (300890112).

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

138338880 is a wasteful number, since it uses less digits than its factorization.

138338880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144123 (or 144113 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 138338880 is about 11761.7549710917. The cubic root of 138338880 is about 517.1875777664.

The spelling of 138338880 in words is "one hundred thirty-eight million, three hundred thirty-eight thousand, eight hundred eighty".