12309828 has 12 divisors (see below), whose sum is σ = 28722960. Its totient is φ = 4103272.

The previous prime is 12309811. The next prime is 12309877. The reversal of 12309828 is 82890321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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, 512898 + ... + 512921.

It is an arithmetic number, because the mean of its divisors is an integer number (2393580).

Almost surely, 2^12309828 is an apocalyptic number.

It is an amenable number.

12309828 is an abundant number, since it is smaller than the sum of its proper divisors (16413132).

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

12309828 is a wasteful number, since it uses less digits than its factorization.

12309828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025826 (or 1025824 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 12309828 is about 3508.5364470103. The cubic root of 12309828 is about 230.8964885458.

The spelling of 12309828 in words is "twelve million, three hundred nine thousand, eight hundred twenty-eight".