12996438 has 48 divisors (see below), whose sum is σ = 32184576. Its totient is φ = 3425760.

The previous prime is 12996433. The next prime is 12996457. The reversal of 12996438 is 83469921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12996438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12996433) 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 23 ways as a sum of consecutive naturals, for example, 6183 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (670512).

Almost surely, 2^12996438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12996438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16092288).

12996438 is an abundant number, since it is smaller than the sum of its proper divisors (19188138).

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

12996438 is a wasteful number, since it uses less digits than its factorization.

12996438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1856 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 12996438 is about 3605.0572810983. The cubic root of 12996438 is about 235.1119912869. Note that the first 3 decimals are identical.

The spelling of 12996438 in words is "twelve million, nine hundred ninety-six thousand, four hundred thirty-eight".