864528 has 80 divisors (see below), whose sum is σ = 2666496. Its totient is φ = 236160.

The previous prime is 864511. The next prime is 864533. The reversal of 864528 is 825468.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

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, 10375 + ... + 10457.

2⁸⁶⁴⁵²⁸ 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 864528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333248).

864528 is an abundant number, since it is smaller than the sum of its proper divisors (1801968).

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

864528 is a wasteful number, since it uses less digits than its factorization.

864528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 126 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 864528 is about 929.7999784900. The cubic root of 864528 is about 95.2634607357.

Subtracting from 864528 its reverse (825468), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 864528 in words is "eight hundred sixty-four thousand, five hundred twenty-eight".