649797984 has 96 divisors (see below), whose sum is σ = 2067569280. Its totient is φ = 196905600.

The previous prime is 649797977. The next prime is 649797991. The reversal of 649797984 is 489797946.

It is an interprime number because it is at equal distance from previous prime (649797977) and next prime (649797991).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24682 + ... + 43689.

It is an arithmetic number, because the mean of its divisors is an integer number (21537180).

Almost surely, 2^649797984 is an apocalyptic number.

It is an amenable number.

649797984 is an abundant number, since it is smaller than the sum of its proper divisors (1417771296).

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

649797984 is a wasteful number, since it uses less digits than its factorization.

649797984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68401 (or 68387 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 649797984 is about 25491.1354003701. The cubic root of 649797984 is about 866.1493554479.

The spelling of 649797984 in words is "six hundred forty-nine million, seven hundred ninety-seven thousand, nine hundred eighty-four".