268930138 has 4 divisors (see below), whose sum is σ = 403395210. Its totient is φ = 134465068.

The previous prime is 268930133. The next prime is 268930139. The reversal of 268930138 is 831039862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 265592209 + 3337929 = 16297^2 + 1827^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 268930138.

It is not an unprimeable number, because it can be changed into a prime (268930133) by changing a digit.

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 as a sum of consecutive naturals, namely, 67232533 + ... + 67232536.

Almost surely, 2^268930138 is an apocalyptic number.

268930138 is a deficient number, since it is larger than the sum of its proper divisors (134465072).

268930138 is a wasteful number, since it uses less digits than its factorization.

268930138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134465071.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 268930138 is about 16399.0895478987. The cubic root of 268930138 is about 645.4755925870.

The spelling of 268930138 in words is "two hundred sixty-eight million, nine hundred thirty thousand, one hundred thirty-eight".