12889538 has 8 divisors (see below), whose sum is σ = 19446588. Its totient is φ = 6407344.

The previous prime is 12889531. The next prime is 12889549. The reversal of 12889538 is 83598821.

It can be written as a sum of positive squares in 2 ways, for example, as 8508889 + 4380649 = 2917^2 + 2093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12889538² = 332280379706888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12889531) 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 in 3 ways as a sum of consecutive naturals, for example, 18281 + ... + 18972.

Almost surely, 2^12889538 is an apocalyptic number.

12889538 is a deficient number, since it is larger than the sum of its proper divisors (6557050).

12889538 is a wasteful number, since it uses less digits than its factorization.

12889538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37428.

The product of its digits is 138240, while the sum is 44.

The square root of 12889538 is about 3590.2002729653. The cubic root of 12889538 is about 234.4655911252.

The spelling of 12889538 in words is "twelve million, eight hundred eighty-nine thousand, five hundred thirty-eight".