12278892 has 48 divisors (see below), whose sum is σ = 29538432. Its totient is φ = 3968640.

The previous prime is 12278887. The next prime is 12278909. The reversal of 12278892 is 29887221.

It is a self number, because there is not a number n which added to its sum of digits gives 12278892.

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, 93667 + ... + 93797.

It is an arithmetic number, because the mean of its divisors is an integer number (615384).

Almost surely, 2^12278892 is an apocalyptic number.

12278892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12278892 is an abundant number, since it is smaller than the sum of its proper divisors (17259540).

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

12278892 is a wasteful number, since it uses less digits than its factorization.

12278892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 316 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 12278892 is about 3504.1249977705. The cubic root of 12278892 is about 230.7029032286.

The spelling of 12278892 in words is "twelve million, two hundred seventy-eight thousand, eight hundred ninety-two".