138558308 has 24 divisors (see below), whose sum is σ = 277368000. Its totient is φ = 59328288.

The previous prime is 138558283. The next prime is 138558319. The reversal of 138558308 is 803855831.

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 7 ways as a sum of consecutive naturals, for example, 53303 + ... + 55841.

It is an arithmetic number, because the mean of its divisors is an integer number (11557000).

Almost surely, 2^138558308 is an apocalyptic number.

It is an amenable number.

138558308 is an abundant number, since it is smaller than the sum of its proper divisors (138809692).

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

138558308 is a wasteful number, since it uses less digits than its factorization.

138558308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499 (or 4497 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 138558308 is about 11771.0793048046. The cubic root of 138558308 is about 517.4608812332.

The spelling of 138558308 in words is "one hundred thirty-eight million, five hundred fifty-eight thousand, three hundred eight".