649908 has 36 divisors (see below), whose sum is σ = 1878240. Its totient is φ = 185616.

The previous prime is 649907. The next prime is 649921. The reversal of 649908 is 809946.

649908 is a `hidden beast` number, since 649 + 9 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649908.

It is not an unprimeable number, because it can be changed into a prime (649907) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1038 + ... + 1541.

2⁶⁴⁹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

649908 is an abundant number, since it is smaller than the sum of its proper divisors (1228332).

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

649908 is a wasteful number, since it uses less digits than its factorization.

649908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 649908 is about 806.1687168329. The cubic root of 649908 is about 86.6198234696.

The spelling of 649908 in words is "six hundred forty-nine thousand, nine hundred eight".