649889808 has 40 divisors (see below), whose sum is σ = 1679797248. Its totient is φ = 216511872.

The previous prime is 649889803. The next prime is 649889833. The reversal of 649889808 is 808988946.

It is not an unprimeable number, because it can be changed into a prime (649889803) 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 7 ways as a sum of consecutive naturals, for example, 161841 + ... + 165807.

Almost surely, 2^649889808 is an apocalyptic number.

It is an amenable number.

649889808 is an abundant number, since it is smaller than the sum of its proper divisors (1029907440).

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

649889808 is a wasteful number, since it uses less digits than its factorization.

649889808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7391 (or 7385 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 60.

The square root of 649889808 is about 25492.9364334515. The cubic root of 649889808 is about 866.1901525133.

The spelling of 649889808 in words is "six hundred forty-nine million, eight hundred eighty-nine thousand, eight hundred eight".