864218528 has 96 divisors (see below), whose sum is σ = 1852538688. Its totient is φ = 395366400.

The previous prime is 864218521. The next prime is 864218539. The reversal of 864218528 is 825812468.

It is not an unprimeable number, because it can be changed into a prime (864218521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4774598 + ... + 4774778.

It is an arithmetic number, because the mean of its divisors is an integer number (19297278).

Almost surely, 2^864218528 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 864218528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926269344).

864218528 is an abundant number, since it is smaller than the sum of its proper divisors (988320160).

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

864218528 is a wasteful number, since it uses less digits than its factorization.

864218528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 398 counting only the distinct ones).

The product of its digits is 245760, while the sum is 44.

The square root of 864218528 is about 29397.5939151489. The cubic root of 864218528 is about 952.5209233882.

It can be divided in two parts, 86421 and 8528, that added together give a palindrome (94949).

The spelling of 864218528 in words is "eight hundred sixty-four million, two hundred eighteen thousand, five hundred twenty-eight".