12278790 has 96 divisors (see below), whose sum is σ = 34384896. Its totient is φ = 3149280.

The previous prime is 12278789. The next prime is 12278801. The reversal of 12278790 is 9787221.

12278790 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 47 ways as a sum of consecutive naturals, for example, 75249 + ... + 75411.

It is an arithmetic number, because the mean of its divisors is an integer number (358176).

Almost surely, 2^12278790 is an apocalyptic number.

12278790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12278790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17192448).

12278790 is an abundant number, since it is smaller than the sum of its proper divisors (22106106).

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

12278790 is a wasteful number, since it uses less digits than its factorization.

12278790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 12278790 is about 3504.1104434649. The cubic root of 12278790 is about 230.7022644152.

The spelling of 12278790 in words is "twelve million, two hundred seventy-eight thousand, seven hundred ninety".