12231428 has 24 divisors (see below), whose sum is σ = 23496480. Its totient is φ = 5525120.

The previous prime is 12231419. The next prime is 12231431. The reversal of 12231428 is 82413221.

It is a happy 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, 7100 + ... + 8652.

It is an arithmetic number, because the mean of its divisors is an integer number (979020).

Almost surely, 2^12231428 is an apocalyptic number.

It is an amenable number.

12231428 is a deficient number, since it is larger than the sum of its proper divisors (11265052).

12231428 is a wasteful number, since it uses less digits than its factorization.

12231428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1745 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 12231428 is about 3497.3458507846. The cubic root of 12231428 is about 230.4052590508.

Adding to 12231428 its reverse (82413221), we get a palindrome (94644649).

The spelling of 12231428 in words is "twelve million, two hundred thirty-one thousand, four hundred twenty-eight".