12347428 has 12 divisors (see below), whose sum is σ = 21660940. Its totient is φ = 6158592.

The previous prime is 12347383. The next prime is 12347429. The reversal of 12347428 is 82474321.

It can be written as a sum of positive squares in 2 ways, for example, as 4293184 + 8054244 = 2072^2 + 2838^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12347428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12347429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833 + ... + 5296.

Almost surely, 2^12347428 is an apocalyptic number.

It is an amenable number.

12347428 is a deficient number, since it is larger than the sum of its proper divisors (9313512).

12347428 is a wasteful number, since it uses less digits than its factorization.

12347428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7566 (or 7564 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 12347428 is about 3513.8907211238. The cubic root of 12347428 is about 231.1313383910.

The spelling of 12347428 in words is "twelve million, three hundred forty-seven thousand, four hundred twenty-eight".