868610 has 8 divisors (see below), whose sum is σ = 1563516. Its totient is φ = 347440.

The previous prime is 868603. The next prime is 868613. The reversal of 868610 is 16868.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 1849 = 931^2 + 43^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (868613) by changing a digit.

868610 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, 43421 + ... + 43440.

2⁸⁶⁸⁶¹⁰ is an apocalyptic number.

868610 is a deficient number, since it is larger than the sum of its proper divisors (694906).

868610 is a wasteful number, since it uses less digits than its factorization.

868610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86868.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 868610 is about 931.9924892401. The cubic root of 868610 is about 95.4131589980.

The spelling of 868610 in words is "eight hundred sixty-eight thousand, six hundred ten".