12863428 has 12 divisors (see below), whose sum is σ = 22544172. Its totient is φ = 6422240.

The previous prime is 12863413. The next prime is 12863429. The reversal of 12863428 is 82436821.

It can be written as a sum of positive squares in 2 ways, for example, as 7064964 + 5798464 = 2658^2 + 2408^2 .

It is a super-2 number, since 2×12863428² = 330935559822368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12863393 and 12863402.

It is not an unprimeable number, because it can be changed into a prime (12863429) 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, 1326 + ... + 5242.

It is an arithmetic number, because the mean of its divisors is an integer number (1878681).

Almost surely, 2^12863428 is an apocalyptic number.

It is an amenable number.

12863428 is a deficient number, since it is larger than the sum of its proper divisors (9680744).

12863428 is a wasteful number, since it uses less digits than its factorization.

12863428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742 (or 4740 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 12863428 is about 3586.5621422192. The cubic root of 12863428 is about 234.3071671667.

The spelling of 12863428 in words is "twelve million, eight hundred sixty-three thousand, four hundred twenty-eight".