649395744 has 48 divisors (see below), whose sum is σ = 1709582112. Its totient is φ = 215840768.

The previous prime is 649395707. The next prime is 649395751. The reversal of 649395744 is 447593946.

It is a happy number.

649395744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 24307 + ... + 43469.

It is an arithmetic number, because the mean of its divisors is an integer number (35616294).

Almost surely, 2^649395744 is an apocalyptic number.

It is an amenable number.

649395744 is an abundant number, since it is smaller than the sum of its proper divisors (1060186368).

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

649395744 is a wasteful number, since it uses less digits than its factorization.

649395744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19529 (or 19521 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The square root of 649395744 is about 25483.2443774336. The cubic root of 649395744 is about 865.9705963878.

The spelling of 649395744 in words is "six hundred forty-nine million, three hundred ninety-five thousand, seven hundred forty-four".