12972784 has 20 divisors (see below), whose sum is σ = 27420120. Its totient is φ = 5896640.

The previous prime is 12972781. The next prime is 12972803. The reversal of 12972784 is 48727921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12972781) by changing a digit.

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, 36679 + ... + 37030.

It is an arithmetic number, because the mean of its divisors is an integer number (1371006).

Almost surely, 2^12972784 is an apocalyptic number.

It is an amenable number.

12972784 is an abundant number, since it is smaller than the sum of its proper divisors (14447336).

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

12972784 is a wasteful number, since it uses less digits than its factorization.

12972784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73728 (or 73722 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 12972784 is about 3601.7751179106. The cubic root of 12972784 is about 234.9692671444.

The spelling of 12972784 in words is "twelve million, nine hundred seventy-two thousand, seven hundred eighty-four".