12864278 has 8 divisors (see below), whose sum is σ = 22053072. Its totient is φ = 5513256.

The previous prime is 12864263. The next prime is 12864307. The reversal of 12864278 is 87246821.

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

It is a super-2 number, since 2×12864278² = 330979296922568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459425 + ... + 459452.

It is an arithmetic number, because the mean of its divisors is an integer number (2756634).

Almost surely, 2^12864278 is an apocalyptic number.

12864278 is a deficient number, since it is larger than the sum of its proper divisors (9188794).

12864278 is an equidigital number, since it uses as much as digits as its factorization.

12864278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918886.

The product of its digits is 43008, while the sum is 38.

The square root of 12864278 is about 3586.6806381388. The cubic root of 12864278 is about 234.3123279659.

The spelling of 12864278 in words is "twelve million, eight hundred sixty-four thousand, two hundred seventy-eight".