12278364 has 48 divisors (see below), whose sum is σ = 32917248. Its totient is φ = 3489408.

The previous prime is 12278333. The next prime is 12278377. The reversal of 12278364 is 46387221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26059 + ... + 26525.

It is an arithmetic number, because the mean of its divisors is an integer number (685776).

Almost surely, 2^12278364 is an apocalyptic number.

12278364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12278364 is an abundant number, since it is smaller than the sum of its proper divisors (20638884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12278364 is a wasteful number, since it uses less digits than its factorization.

12278364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 12278364 is about 3504.0496571824. The cubic root of 12278364 is about 230.6995963917.

It can be divided in two parts, 1227 and 8364, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 12278364 in words is "twelve million, two hundred seventy-eight thousand, three hundred sixty-four".