12723928 has 32 divisors (see below), whose sum is σ = 27828000. Its totient is φ = 5451936.

The previous prime is 12723923. The next prime is 12723941. The reversal of 12723928 is 82932721.

It is a junction number, because it is equal to n+sod(n) for n = 12723893 and 12723902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12723923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 5062.

It is an arithmetic number, because the mean of its divisors is an integer number (869625).

Almost surely, 2^12723928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12723928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13914000).

12723928 is an abundant number, since it is smaller than the sum of its proper divisors (15104072).

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

12723928 is an equidigital number, since it uses as much as digits as its factorization.

12723928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664 (or 4646 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 12723928 is about 3567.0615357742. The cubic root of 12723928 is about 233.4570899053.

The spelling of 12723928 in words is "twelve million, seven hundred twenty-three thousand, nine hundred twenty-eight".