868210 has 32 divisors (see below), whose sum is σ = 1820160. Its totient is φ = 292032.

The previous prime is 868199. The next prime is 868211. The reversal of 868210 is 12868.

It is an Ulam number.

It is a plaindrome in base 15.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868211) by changing a digit.

868210 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5452 + ... + 5608.

It is an arithmetic number, because the mean of its divisors is an integer number (56880).

2⁸⁶⁸²¹⁰ is an apocalyptic number.

868210 is an abundant number, since it is smaller than the sum of its proper divisors (951950).

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

868210 is a wasteful number, since it uses less digits than its factorization.

868210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 868210 is about 931.7778705249. Note that the first 3 decimals coincide. The cubic root of 868210 is about 95.3985106428.

The spelling of 868210 in words is "eight hundred sixty-eight thousand, two hundred ten".