12433728 has 56 divisors (see below), whose sum is σ = 33975040. Its totient is φ = 4008960.

The previous prime is 12433717. The next prime is 12433741. The reversal of 12433728 is 82733421.

12433728 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12433695 and 12433704.

It is a congruent number.

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, 4908 + ... + 6996.

Almost surely, 2^12433728 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 12433728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16987520).

12433728 is an abundant number, since it is smaller than the sum of its proper divisors (21541312).

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

12433728 is a wasteful number, since it uses less digits than its factorization.

12433728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2125 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 12433728 is about 3526.1491743827. The cubic root of 12433728 is about 231.6685715444.

The spelling of 12433728 in words is "twelve million, four hundred thirty-three thousand, seven hundred twenty-eight".