649195880 has 32 divisors (see below), whose sum is σ = 1485453600. Its totient is φ = 255276096.

The previous prime is 649195879. The next prime is 649195901. The reversal of 649195880 is 88591946.

It is a happy number.

649195880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135182 + ... + 139901.

It is an arithmetic number, because the mean of its divisors is an integer number (46420425).

Almost surely, 2^649195880 is an apocalyptic number.

It is an amenable number.

649195880 is an abundant number, since it is smaller than the sum of its proper divisors (836257720).

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

649195880 is a wasteful number, since it uses less digits than its factorization.

649195880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275153 (or 275149 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 649195880 is about 25479.3225969609. The cubic root of 649195880 is about 865.8817475835.

The spelling of 649195880 in words is "six hundred forty-nine million, one hundred ninety-five thousand, eight hundred eighty".