138838258 has 16 divisors (see below), whose sum is σ = 234029376. Its totient is φ = 61292880.

The previous prime is 138838247. The next prime is 138838261. The reversal of 138838258 is 852838831.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 115488 + ... + 116683.

It is an arithmetic number, because the mean of its divisors is an integer number (14626836).

Almost surely, 2^138838258 is an apocalyptic number.

138838258 is a deficient number, since it is larger than the sum of its proper divisors (95191118).

138838258 is a wasteful number, since it uses less digits than its factorization.

138838258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232209.

The product of its digits is 368640, while the sum is 46.

The square root of 138838258 is about 11782.9647372807. The cubic root of 138838258 is about 517.8091478999.

The spelling of 138838258 in words is "one hundred thirty-eight million, eight hundred thirty-eight thousand, two hundred fifty-eight".