12673728 has 42 divisors (see below), whose sum is σ = 36328604. Its totient is φ = 4224384.

The previous prime is 12673709. The next prime is 12673751. The reversal of 12673728 is 82737621.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12673692 and 12673701.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10426 + ... + 11577.

Almost surely, 2^12673728 is an apocalyptic number.

12673728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12673728 is an abundant number, since it is smaller than the sum of its proper divisors (23654876).

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

12673728 is a wasteful number, since it uses less digits than its factorization.

12673728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22021 (or 22008 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 12673728 is about 3560.0179774827. The cubic root of 12673728 is about 233.1496640787.

The spelling of 12673728 in words is "twelve million, six hundred seventy-three thousand, seven hundred twenty-eight".