138830408 has 8 divisors (see below), whose sum is σ = 260307030. Its totient is φ = 69415200.

The previous prime is 138830407. The next prime is 138830411. The reversal of 138830408 is 804038831.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 14884 = 11782^2 + 122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (138830407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8676893 + ... + 8676908.

Almost surely, 2^138830408 is an apocalyptic number.

It is an amenable number.

138830408 is a deficient number, since it is larger than the sum of its proper divisors (121476622).

138830408 is a wasteful number, since it uses less digits than its factorization.

138830408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17353807 (or 17353803 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 138830408 is about 11782.6316245565. The cubic root of 138830408 is about 517.7993886340.

The spelling of 138830408 in words is "one hundred thirty-eight million, eight hundred thirty thousand, four hundred eight".