12808431 has 6 divisors (see below), whose sum is σ = 18501080. Its totient is φ = 8538948.

The previous prime is 12808387. The next prime is 12808469. The reversal of 12808431 is 13480821.

It is not a de Polignac number, because 12808431 - 2¹¹ = 12806383 is a prime.

It is a super-2 number, since 2×12808431² = 328111809363522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12808395 and 12808404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12818431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711571 + ... + 711588.

Almost surely, 2^12808431 is an apocalyptic number.

12808431 is a deficient number, since it is larger than the sum of its proper divisors (5692649).

12808431 is a wasteful number, since it uses less digits than its factorization.

12808431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423165 (or 1423162 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 12808431 is about 3578.8868381104. The cubic root of 12808431 is about 233.9727669381.

The spelling of 12808431 in words is "twelve million, eight hundred eight thousand, four hundred thirty-one".