268538 has 4 divisors (see below), whose sum is σ = 402810. Its totient is φ = 134268.

The previous prime is 268537. The next prime is 268547. The reversal of 268538 is 835862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835862 = 2 ⋅417931.

It can be written as a sum of positive squares in only one way, i.e., 170569 + 97969 = 413^2 + 313^2 .

It is a super-2 number, since 2×268538² = 144225314888, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 6³ + 5² + 8⁴ + 3² + 8⁶ .

It is not an unprimeable number, because it can be changed into a prime (268531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67133 + ... + 67136.

2²⁶⁸⁵³⁸ is an apocalyptic number.

268538 is a deficient number, since it is larger than the sum of its proper divisors (134272).

268538 is a wasteful number, since it uses less digits than its factorization.

268538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134271.

The product of its digits is 11520, while the sum is 32.

The square root of 268538 is about 518.2065225371. The cubic root of 268538 is about 64.5161708548.

The spelling of 268538 in words is "two hundred sixty-eight thousand, five hundred thirty-eight".