649662 has 16 divisors (see below), whose sum is σ = 1399440. Its totient is φ = 199872.

The previous prime is 649661. The next prime is 649697. The reversal of 649662 is 266946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649661) 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 7 ways as a sum of consecutive naturals, for example, 4087 + ... + 4242.

It is an arithmetic number, because the mean of its divisors is an integer number (87465).

2⁶⁴⁹⁶⁶² is an apocalyptic number.

649662 is an abundant number, since it is smaller than the sum of its proper divisors (749778).

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

649662 is a wasteful number, since it uses less digits than its factorization.

649662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347.

The product of its digits is 15552, while the sum is 33.

The square root of 649662 is about 806.0161288709. The cubic root of 649662 is about 86.6088931196.

The spelling of 649662 in words is "six hundred forty-nine thousand, six hundred sixty-two".