865528 has 8 divisors (see below), whose sum is σ = 1622880. Its totient is φ = 432760.

The previous prime is 865511. The next prime is 865537. The reversal of 865528 is 825568.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 865493 and 865502.

It is a congruent number.

It is an unprimeable number.

865528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 54088 + ... + 54103.

It is an arithmetic number, because the mean of its divisors is an integer number (202860).

2⁸⁶⁵⁵²⁸ is an apocalyptic number.

It is an amenable number.

865528 is a deficient number, since it is larger than the sum of its proper divisors (757352).

865528 is a wasteful number, since it uses less digits than its factorization.

865528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108197 (or 108193 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 865528 is about 930.3375731421. The cubic root of 865528 is about 95.3001770147.

It can be divided in two parts, 8 and 65528, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 865528 in words is "eight hundred sixty-five thousand, five hundred twenty-eight".