138163258 has 12 divisors (see below), whose sum is σ = 209920410. Its totient is φ = 68201016.

The previous prime is 138163243. The next prime is 138163321. The reversal of 138163258 is 852361831.

138163258 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 134861769 + 3301489 = 11613^2 + 1817^2 .

It is a super-2 number, since 2×138163258² = 38178171722349128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6948 + ... + 18016.

Almost surely, 2^138163258 is an apocalyptic number.

138163258 is a deficient number, since it is larger than the sum of its proper divisors (71757152).

138163258 is an equidigital number, since it uses as much as digits as its factorization.

138163258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229 (or 11150 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 138163258 is about 11754.2867924855. The cubic root of 138163258 is about 516.9686275573.

The spelling of 138163258 in words is "one hundred thirty-eight million, one hundred sixty-three thousand, two hundred fifty-eight".