12393828 has 18 divisors (see below), whose sum is σ = 31328934. Its totient is φ = 4131264.

The previous prime is 12393791. The next prime is 12393851. The reversal of 12393828 is 82839321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7518564 + 4875264 = 2742^2 + 2208^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 344273 = 12393828 / (1 + 2 + 3 + 9 + 3 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 12393792 and 12393801.

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 5 ways as a sum of consecutive naturals, for example, 172101 + ... + 172172.

Almost surely, 2^12393828 is an apocalyptic number.

12393828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12393828 is an abundant number, since it is smaller than the sum of its proper divisors (18935106).

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

12393828 is a wasteful number, since it uses less digits than its factorization.

12393828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344283 (or 344278 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 12393828 is about 3520.4868981435. The cubic root of 12393828 is about 231.4204968115.

The spelling of 12393828 in words is "twelve million, three hundred ninety-three thousand, eight hundred twenty-eight".