12117828 has 12 divisors (see below), whose sum is σ = 28274960. Its totient is φ = 4039272.

The previous prime is 12117823. The next prime is 12117841. The reversal of 12117828 is 82871121.

It is a happy number.

12117828 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 12117795 and 12117804.

It is not an unprimeable number, because it can be changed into a prime (12117823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504898 + ... + 504921.

Almost surely, 2^12117828 is an apocalyptic number.

It is an amenable number.

12117828 is an abundant number, since it is smaller than the sum of its proper divisors (16157132).

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

12117828 is a wasteful number, since it uses less digits than its factorization.

12117828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009826 (or 1009824 counting only the distinct ones).

The product of its digits is 1792, while the sum is 30.

The square root of 12117828 is about 3481.0670777795. The cubic root of 12117828 is about 229.6897391887.

Adding to 12117828 its reverse (82871121), we get a palindrome (94988949).

The spelling of 12117828 in words is "twelve million, one hundred seventeen thousand, eight hundred twenty-eight".