12840472 has 16 divisors (see below), whose sum is σ = 24325560. Its totient is φ = 6353664.

The previous prime is 12840461. The next prime is 12840473. The reversal of 12840472 is 27404821.

12840472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12840472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840473) 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, 7498 + ... + 9049.

Almost surely, 2^12840472 is an apocalyptic number.

It is an amenable number.

12840472 is a deficient number, since it is larger than the sum of its proper divisors (11485088).

12840472 is a wasteful number, since it uses less digits than its factorization.

12840472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650 (or 16646 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 12840472 is about 3583.3604340060. The cubic root of 12840472 is about 234.1677030950.

The spelling of 12840472 in words is "twelve million, eight hundred forty thousand, four hundred seventy-two".