12311428 has 24 divisors (see below), whose sum is σ = 22438080. Its totient is φ = 5903520.

The previous prime is 12311419. The next prime is 12311443. The reversal of 12311428 is 82411321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12311399 and 12311408.

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, 24225 + ... + 24727.

It is an arithmetic number, because the mean of its divisors is an integer number (934920).

Almost surely, 2^12311428 is an apocalyptic number.

It is an amenable number.

12311428 is a deficient number, since it is larger than the sum of its proper divisors (10126652).

12311428 is a wasteful number, since it uses less digits than its factorization.

12311428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 12311428 is about 3508.7644549043. The cubic root of 12311428 is about 230.9064918910.

Adding to 12311428 its reverse (82411321), we get a palindrome (94722749).

The spelling of 12311428 in words is "twelve million, three hundred eleven thousand, four hundred twenty-eight".