12278798 has 8 divisors (see below), whose sum is σ = 21049392. Its totient is φ = 5262336.

The previous prime is 12278789. The next prime is 12278801. The reversal of 12278798 is 89787221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438515 + ... + 438542.

It is an arithmetic number, because the mean of its divisors is an integer number (2631174).

Almost surely, 2^12278798 is an apocalyptic number.

12278798 is a deficient number, since it is larger than the sum of its proper divisors (8770594).

12278798 is an equidigital number, since it uses as much as digits as its factorization.

12278798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877066.

The product of its digits is 112896, while the sum is 44.

The square root of 12278798 is about 3504.1115849813. Note that the first 3 decimals coincide. The cubic root of 12278798 is about 230.7023145184.

The spelling of 12278798 in words is "twelve million, two hundred seventy-eight thousand, seven hundred ninety-eight".