12696440 has 16 divisors (see below), whose sum is σ = 28567080. Its totient is φ = 5078560.

The previous prime is 12696413. The next prime is 12696443. The reversal of 12696440 is 4469621.

It is a happy number.

It is a super-2 number, since 2×12696440² = 322399177347200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12696397 and 12696406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12696443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158666 + ... + 158745.

Almost surely, 2^12696440 is an apocalyptic number.

12696440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12696440 is an abundant number, since it is smaller than the sum of its proper divisors (15870640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12696440 is a wasteful number, since it uses less digits than its factorization.

12696440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317422 (or 317418 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 12696440 is about 3563.2064211886. The cubic root of 12696440 is about 233.2888531993.

The spelling of 12696440 in words is "twelve million, six hundred ninety-six thousand, four hundred forty".