12978924 has 36 divisors (see below), whose sum is σ = 35230104. Its totient is φ = 3708096.

The previous prime is 12978913. The next prime is 12978929. The reversal of 12978924 is 42987921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (12978929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10449 + ... + 11624.

It is an arithmetic number, because the mean of its divisors is an integer number (978614).

Almost surely, 2^12978924 is an apocalyptic number.

12978924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12978924 is an abundant number, since it is smaller than the sum of its proper divisors (22251180).

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

12978924 is a wasteful number, since it uses less digits than its factorization.

12978924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22094 (or 22085 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 12978924 is about 3602.6273745698. The cubic root of 12978924 is about 235.0063315029.

The spelling of 12978924 in words is "twelve million, nine hundred seventy-eight thousand, nine hundred twenty-four".