12861528 has 64 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 4064640.

The previous prime is 12861517. The next prime is 12861553. The reversal of 12861528 is 82516821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43750 + ... + 44042.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^12861528 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 12861528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16934400).

12861528 is an abundant number, since it is smaller than the sum of its proper divisors (21007272).

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

12861528 is a wasteful number, since it uses less digits than its factorization.

12861528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 388 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 12861528 is about 3586.2972548298. The cubic root of 12861528 is about 234.2956304406.

The spelling of 12861528 in words is "twelve million, eight hundred sixty-one thousand, five hundred twenty-eight".