843664 has 20 divisors (see below), whose sum is σ = 1661104. Its totient is φ = 415008.

The previous prime is 843649. The next prime is 843677. The reversal of 843664 is 466348.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679 + ... + 1465.

2⁸⁴³⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

843664 is a deficient number, since it is larger than the sum of its proper divisors (817440).

843664 is a wasteful number, since it uses less digits than its factorization.

843664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 856 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 843664 is about 918.5118398801. The cubic root of 843664 is about 94.4908681675.

The spelling of 843664 in words is "eight hundred forty-three thousand, six hundred sixty-four".