138070258 has 4 divisors (see below), whose sum is σ = 207105390. Its totient is φ = 69035128.

The previous prime is 138070241. The next prime is 138070279. The reversal of 138070258 is 852070831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 852070831 = 1543 ⋅552217.

It can be written as a sum of positive squares in only one way, i.e., 81414529 + 56655729 = 9023^2 + 7527^2 .

It is a super-2 number, since 2×138070258² = 38126792288373128, 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 as a sum of consecutive naturals, namely, 34517563 + ... + 34517566.

Almost surely, 2^138070258 is an apocalyptic number.

138070258 is a deficient number, since it is larger than the sum of its proper divisors (69035132).

138070258 is an equidigital number, since it uses as much as digits as its factorization.

138070258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69035131.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 138070258 is about 11750.3301230221. The cubic root of 138070258 is about 516.8526081117.

The spelling of 138070258 in words is "one hundred thirty-eight million, seventy thousand, two hundred fifty-eight".