12840924 has 24 divisors (see below), whose sum is σ = 30773008. Its totient is φ = 4164480.

The previous prime is 12840911. The next prime is 12840931. The reversal of 12840924 is 42904821.

It is a junction number, because it is equal to n+sod(n) for n = 12840891 and 12840900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14017 + ... + 14904.

Almost surely, 2^12840924 is an apocalyptic number.

It is an amenable number.

12840924 is an abundant number, since it is smaller than the sum of its proper divisors (17932084).

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

12840924 is a wasteful number, since it uses less digits than its factorization.

12840924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28965 (or 28963 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 12840924 is about 3583.4235027415. The cubic root of 12840924 is about 234.1704507240.

The spelling of 12840924 in words is "twelve million, eight hundred forty thousand, nine hundred twenty-four".