12788278 has 16 divisors (see below), whose sum is σ = 19509840. Its totient is φ = 6286176.

The previous prime is 12788263. The next prime is 12788327. The reversal of 12788278 is 87288721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43500 + ... + 43792.

It is an arithmetic number, because the mean of its divisors is an integer number (1219365).

Almost surely, 2^12788278 is an apocalyptic number.

12788278 is a deficient number, since it is larger than the sum of its proper divisors (6721562).

12788278 is a wasteful number, since it uses less digits than its factorization.

12788278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591.

The product of its digits is 100352, while the sum is 43.

The square root of 12788278 is about 3576.0701894678. The cubic root of 12788278 is about 233.8499902984.

The spelling of 12788278 in words is "twelve million, seven hundred eighty-eight thousand, two hundred seventy-eight".