649069900 has 18 divisors (see below), whose sum is σ = 1408481900. Its totient is φ = 259627920.

The previous prime is 649069879. The next prime is 649069901. The reversal of 649069900 is 9960946.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (649069901) 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 5 ways as a sum of consecutive naturals, for example, 3245250 + ... + 3245449.

Almost surely, 2^649069900 is an apocalyptic number.

It is an amenable number.

649069900 is an abundant number, since it is smaller than the sum of its proper divisors (759412000).

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

649069900 is a wasteful number, since it uses less digits than its factorization.

649069900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490713 (or 6490706 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 649069900 is about 25476.8502762802. The cubic root of 649069900 is about 865.8257342688.

The spelling of 649069900 in words is "six hundred forty-nine million, sixty-nine thousand, nine hundred".