868490 has 32 divisors (see below), whose sum is σ = 1883520. Its totient is φ = 281664.

The previous prime is 868489. The next prime is 868493. The reversal of 868490 is 94868.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 868490.

It is not an unprimeable number, because it can be changed into a prime (868493) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1004 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (58860).

2⁸⁶⁸⁴⁹⁰ is an apocalyptic number.

868490 is an abundant number, since it is smaller than the sum of its proper divisors (1015030).

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

868490 is a wasteful number, since it uses less digits than its factorization.

868490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 868490 is about 931.9281088153. The cubic root of 868490 is about 95.4087649637.

The spelling of 868490 in words is "eight hundred sixty-eight thousand, four hundred ninety".