12278886 has 16 divisors (see below), whose sum is σ = 24621168. Its totient is φ = 4082400.

The previous prime is 12278869. The next prime is 12278887. The reversal of 12278886 is 68887221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 4956.

It is an arithmetic number, because the mean of its divisors is an integer number (1538823).

Almost surely, 2^12278886 is an apocalyptic number.

12278886 is an abundant number, since it is smaller than the sum of its proper divisors (12342282).

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

12278886 is a wasteful number, since it uses less digits than its factorization.

12278886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287.

The product of its digits is 86016, while the sum is 42.

The square root of 12278886 is about 3504.1241416365. The cubic root of 12278886 is about 230.7028656514.

The spelling of 12278886 in words is "twelve million, two hundred seventy-eight thousand, eight hundred eighty-six".