865028 has 12 divisors (see below), whose sum is σ = 1602972. Its totient is φ = 407040.

The previous prime is 865003. The next prime is 865043. The reversal of 865028 is 820568.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 145924 = 848^2 + 382^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865028.

It is an unprimeable number.

865028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6293 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (133581).

2⁸⁶⁵⁰²⁸ is an apocalyptic number.

It is an amenable number.

865028 is a deficient number, since it is larger than the sum of its proper divisors (737944).

865028 is a wasteful number, since it uses less digits than its factorization.

865028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12742 (or 12740 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 865028 is about 930.0688146584. The cubic root of 865028 is about 95.2818224123.

Adding to 865028 its product of nonzero digits (3840), we get a palindrome (868868).

The spelling of 865028 in words is "eight hundred sixty-five thousand, twenty-eight".