264478 has 8 divisors (see below), whose sum is σ = 399168. Its totient is φ = 131424.

The previous prime is 264463. The next prime is 264487. The reversal of 264478 is 874462.

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

It is a super-2 number, since 2×264478² = 139897224968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

264478 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 150 + ... + 742.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2²⁶⁴⁴⁷⁸ is an apocalyptic number.

264478 is a deficient number, since it is larger than the sum of its proper divisors (134690).

264478 is a wasteful number, since it uses less digits than its factorization.

264478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 10752, while the sum is 31.

The square root of 264478 is about 514.2742459039. The cubic root of 264478 is about 64.1893804635.

The spelling of 264478 in words is "two hundred sixty-four thousand, four hundred seventy-eight".