138055258 has 16 divisors (see below), whose sum is σ = 227985120. Its totient is φ = 62175600.

The previous prime is 138055237. The next prime is 138055277. The reversal of 138055258 is 852550831.

It is a super-2 number, since 2×138055258² = 38118508522893128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26388 + ... + 31183.

It is an arithmetic number, because the mean of its divisors is an integer number (14249070).

Almost surely, 2^138055258 is an apocalyptic number.

138055258 is a deficient number, since it is larger than the sum of its proper divisors (89929862).

138055258 is a wasteful number, since it uses less digits than its factorization.

138055258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57693.

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 138055258 is about 11749.6918257459. The cubic root of 138055258 is about 516.8338904192.

The spelling of 138055258 in words is "one hundred thirty-eight million, fifty-five thousand, two hundred fifty-eight".