649168 has 20 divisors (see below), whose sum is σ = 1354948. Its totient is φ = 299520.

The previous prime is 649157. The next prime is 649183. The reversal of 649168 is 861946.

It can be written as a sum of positive squares in 2 ways, for example, as 28224 + 620944 = 168^2 + 788^2 .

It is a congruent number.

It is an unprimeable number.

649168 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353 + ... + 1768.

2⁶⁴⁹¹⁶⁸ is an apocalyptic number.

It is an amenable number.

649168 is an abundant number, since it is smaller than the sum of its proper divisors (705780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649168 is a wasteful number, since it uses less digits than its factorization.

649168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3136 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 649168 is about 805.7096251132. The cubic root of 649168 is about 86.5869352183.

The spelling of 649168 in words is "six hundred forty-nine thousand, one hundred sixty-eight".