264538 has 8 divisors (see below), whose sum is σ = 410580. Its totient is φ = 127680.

The previous prime is 264529. The next prime is 264553. The reversal of 264538 is 835462.

It can be written as a sum of positive squares in 2 ways, for example, as 263169 + 1369 = 513^2 + 37^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223 + ... + 2338.

2²⁶⁴⁵³⁸ is an apocalyptic number.

264538 is a deficient number, since it is larger than the sum of its proper divisors (146042).

264538 is a wasteful number, since it uses less digits than its factorization.

264538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592.

The product of its digits is 5760, while the sum is 28.

The square root of 264538 is about 514.3325772299. The cubic root of 264538 is about 64.1942341396.

The spelling of 264538 in words is "two hundred sixty-four thousand, five hundred thirty-eight".