868520 has 16 divisors (see below), whose sum is σ = 1954260. Its totient is φ = 347392.

The previous prime is 868493. The next prime is 868529. The reversal of 868520 is 25868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 33124 = 914^2 + 182^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868520.

It is not an unprimeable number, because it can be changed into a prime (868529) by changing a digit.

868520 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10817 + ... + 10896.

2⁸⁶⁸⁵²⁰ is an apocalyptic number.

It is an amenable number.

868520 is an abundant number, since it is smaller than the sum of its proper divisors (1085740).

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

868520 is a wasteful number, since it uses less digits than its factorization.

868520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724 (or 21720 counting only the distinct ones).

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

The square root of 868520 is about 931.9442043384. The cubic root of 868520 is about 95.4098635103.

The spelling of 868520 in words is "eight hundred sixty-eight thousand, five hundred twenty".