646892 has 12 divisors (see below), whose sum is σ = 1158696. Its totient is φ = 315840.

The previous prime is 646889. The next prime is 646897. The reversal of 646892 is 298646.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646892.

It is not an unprimeable number, because it can be changed into a prime (646897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709 + ... + 2052.

It is an arithmetic number, because the mean of its divisors is an integer number (96558).

2⁶⁴⁶⁸⁹² is an apocalyptic number.

It is an amenable number.

646892 is a deficient number, since it is larger than the sum of its proper divisors (511804).

646892 is a wasteful number, since it uses less digits than its factorization.

646892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808 (or 3806 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 646892 is about 804.2959654257. The cubic root of 646892 is about 86.4856247064.

The spelling of 646892 in words is "six hundred forty-six thousand, eight hundred ninety-two".