12887864 has 32 divisors (see below), whose sum is σ = 26578800. Its totient is φ = 5809920.

The previous prime is 12887863. The next prime is 12887869. The reversal of 12887864 is 46878821.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887863) 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 7 ways as a sum of consecutive naturals, for example, 11522 + ... + 12590.

Almost surely, 2^12887864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12887864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13289400).

12887864 is an abundant number, since it is smaller than the sum of its proper divisors (13690936).

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

12887864 is a wasteful number, since it uses less digits than its factorization.

12887864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1219 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The square root of 12887864 is about 3589.9671307687. The cubic root of 12887864 is about 234.4554404538.

The spelling of 12887864 in words is "twelve million, eight hundred eighty-seven thousand, eight hundred sixty-four".