138755408 has 20 divisors (see below), whose sum is σ = 293278848. Its totient is φ = 63070560.

The previous prime is 138755399. The next prime is 138755417. The reversal of 138755408 is 804557831.

It is an interprime number because it is at equal distance from previous prime (138755399) and next prime (138755417).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 394016 + ... + 394367.

Almost surely, 2^138755408 is an apocalyptic number.

It is an amenable number.

138755408 is an abundant number, since it is smaller than the sum of its proper divisors (154523440).

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

138755408 is a wasteful number, since it uses less digits than its factorization.

138755408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788402 (or 788396 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 138755408 is about 11779.4485439684. The cubic root of 138755408 is about 517.7061286870.

The spelling of 138755408 in words is "one hundred thirty-eight million, seven hundred fifty-five thousand, four hundred eight".