646108 has 6 divisors (see below), whose sum is σ = 1130696. Its totient is φ = 323052.

The previous prime is 646103. The next prime is 646147. The reversal of 646108 is 801646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646103) by changing a digit.

646108 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 80760 + ... + 80767.

2⁶⁴⁶¹⁰⁸ is an apocalyptic number.

It is an amenable number.

646108 is a deficient number, since it is larger than the sum of its proper divisors (484588).

646108 is a wasteful number, since it uses less digits than its factorization.

646108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161531 (or 161529 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 646108 is about 803.8084348898. The cubic root of 646108 is about 86.4506718651.

The spelling of 646108 in words is "six hundred forty-six thousand, one hundred eight".