862664 has 16 divisors (see below), whose sum is σ = 1764720. Its totient is φ = 392080.

The previous prime is 862651. The next prime is 862669. The reversal of 862664 is 466268.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 862664.

It is not an unprimeable number, because it can be changed into a prime (862669) by changing a digit.

862664 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, 4814 + ... + 4989.

It is an arithmetic number, because the mean of its divisors is an integer number (110295).

2⁸⁶²⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

862664 is an abundant number, since it is smaller than the sum of its proper divisors (902056).

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

862664 is a wasteful number, since it uses less digits than its factorization.

862664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820 (or 9816 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 862664 is about 928.7970714855. The cubic root of 862664 is about 95.1949459455.

The spelling of 862664 in words is "eight hundred sixty-two thousand, six hundred sixty-four".