12778924 has 24 divisors (see below), whose sum is σ = 23099328. Its totient is φ = 6182400.

The previous prime is 12778873. The next prime is 12778933. The reversal of 12778924 is 42987721.

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, 18652 + ... + 19324.

It is an arithmetic number, because the mean of its divisors is an integer number (962472).

Almost surely, 2^12778924 is an apocalyptic number.

It is an amenable number.

12778924 is a deficient number, since it is larger than the sum of its proper divisors (10320404).

12778924 is a wasteful number, since it uses less digits than its factorization.

12778924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 823 counting only the distinct ones).

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

The square root of 12778924 is about 3574.7620899858. The cubic root of 12778924 is about 233.7929597803.

It can be divided in two parts, 1277 and 8924, that added together give a palindrome (10201).

The spelling of 12778924 in words is "twelve million, seven hundred seventy-eight thousand, nine hundred twenty-four".