849864 has 32 divisors (see below), whose sum is σ = 2250720. Its totient is φ = 266496.

The previous prime is 849857. The next prime is 849869. The reversal of 849864 is 468948.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 849864.

It is not an unprimeable number, because it can be changed into a prime (849869) by changing a digit.

849864 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 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (70335).

2⁸⁴⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

849864 is an abundant number, since it is smaller than the sum of its proper divisors (1400856).

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

849864 is a wasteful number, since it uses less digits than its factorization.

849864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109 (or 2105 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 849864 is about 921.8806864231. The cubic root of 849864 is about 94.7217713519.

The spelling of 849864 in words is "eight hundred forty-nine thousand, eight hundred sixty-four".