264278 has 16 divisors (see below), whose sum is σ = 464640. Its totient is φ = 110376.

The previous prime is 264269. The next prime is 264283. The reversal of 264278 is 872462.

It is a super-2 number, since 2×264278² = 139685722568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 264278.

It is a congruent number.

It is an unprimeable number.

264278 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (29040).

2²⁶⁴²⁷⁸ is an apocalyptic number.

264278 is a deficient number, since it is larger than the sum of its proper divisors (200362).

264278 is a wasteful number, since it uses less digits than its factorization.

264278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 5376, while the sum is 29.

The square root of 264278 is about 514.0797603485. The cubic root of 264278 is about 64.1731962396.

The spelling of 264278 in words is "two hundred sixty-four thousand, two hundred seventy-eight".