12887438 has 4 divisors (see below), whose sum is σ = 19331160. Its totient is φ = 6443718.

The previous prime is 12887437. The next prime is 12887443. The reversal of 12887438 is 83478821.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×12887438³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12887395 and 12887404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221858 + ... + 3221861.

It is an arithmetic number, because the mean of its divisors is an integer number (4832790).

Almost surely, 2^12887438 is an apocalyptic number.

12887438 is a deficient number, since it is larger than the sum of its proper divisors (6443722).

12887438 is an equidigital number, since it uses as much as digits as its factorization.

12887438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443721.

The product of its digits is 86016, while the sum is 41.

The square root of 12887438 is about 3589.9077982589. The cubic root of 12887438 is about 234.4528571678.

The spelling of 12887438 in words is "twelve million, eight hundred eighty-seven thousand, four hundred thirty-eight".