12347816 has 24 divisors (see below), whose sum is σ = 25072830. Its totient is φ = 5698368.

The previous prime is 12347807. The next prime is 12347821. The reversal of 12347816 is 61874321.

12347816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 8145316 + 4202500 = 2854^2 + 2050^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3215 + ... + 5918.

Almost surely, 2^12347816 is an apocalyptic number.

It is an amenable number.

12347816 is an abundant number, since it is smaller than the sum of its proper divisors (12725014).

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

12347816 is a wasteful number, since it uses less digits than its factorization.

12347816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165 (or 9148 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 12347816 is about 3513.9459301475. The cubic root of 12347816 is about 231.1337593545.

The spelling of 12347816 in words is "twelve million, three hundred forty-seven thousand, eight hundred sixteen".