646876 has 12 divisors (see below), whose sum is σ = 1151640. Its totient is φ = 317840.

The previous prime is 646873. The next prime is 646879. The reversal of 646876 is 678646.

It is an interprime number because it is at equal distance from previous prime (646873) and next prime (646879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646873) 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, 1135 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (95970).

2⁶⁴⁶⁸⁷⁶ is an apocalyptic number.

It is an amenable number.

646876 is a deficient number, since it is larger than the sum of its proper divisors (504764).

646876 is a wasteful number, since it uses less digits than its factorization.

646876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2802 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 646876 is about 804.2860187769. The cubic root of 646876 is about 86.4849116654.

The spelling of 646876 in words is "six hundred forty-six thousand, eight hundred seventy-six".