12279816 has 64 divisors (see below), whose sum is σ = 34440000. Its totient is φ = 4053888.

The previous prime is 12279803. The next prime is 12279829. The reversal of 12279816 is 61897221.

It is an interprime number because it is at equal distance from previous prime (12279803) and next prime (12279829).

It is a super-3 number, since 3×12279816³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 29820 + ... + 30228.

It is an arithmetic number, because the mean of its divisors is an integer number (538125).

Almost surely, 2^12279816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12279816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17220000).

12279816 is an abundant number, since it is smaller than the sum of its proper divisors (22160184).

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

12279816 is a wasteful number, since it uses less digits than its factorization.

12279816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 553 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 12279816 is about 3504.2568399020. The cubic root of 12279816 is about 230.7086899651.

The spelling of 12279816 in words is "twelve million, two hundred seventy-nine thousand, eight hundred sixteen".