831664 has 20 divisors (see below), whose sum is σ = 1640520. Its totient is φ = 408320.

The previous prime is 831661. The next prime is 831679. The reversal of 831664 is 466138.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (831661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504 + ... + 1384.

It is an arithmetic number, because the mean of its divisors is an integer number (82026).

2⁸³¹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

831664 is a deficient number, since it is larger than the sum of its proper divisors (808856).

831664 is a wasteful number, since it uses less digits than its factorization.

831664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 942 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 831664 is about 911.9561392962. The cubic root of 831664 is about 94.0407247711.

The spelling of 831664 in words is "eight hundred thirty-one thousand, six hundred sixty-four".