12887658 has 48 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 3554208.

The previous prime is 12887657. The next prime is 12887713. The reversal of 12887658 is 85678821.

It is not an unprimeable number, because it can be changed into a prime (12887657) 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 23 ways as a sum of consecutive naturals, for example, 1891 + ... + 5417.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^12887658 is an apocalyptic number.

12887658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12887658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16511040).

12887658 is an abundant number, since it is smaller than the sum of its proper divisors (20134422).

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

12887658 is a wasteful number, since it uses less digits than its factorization.

12887658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571 (or 3568 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 12887658 is about 3589.9384395836. The cubic root of 12887658 is about 234.4541912663.

The spelling of 12887658 in words is "twelve million, eight hundred eighty-seven thousand, six hundred fifty-eight".