9704639808 has 140 divisors (see below), whose sum is σ = 29760039540. Its totient is φ = 3123283968.

The previous prime is 9704639797. The next prime is 9704639851. The reversal of 9704639808 is 8089364079.

9704639808 is a `hidden beast` number, since 97 + 0 + 463 + 98 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1810672704 + 7893967104 = 42552^2 + 88848^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 118060 + ... + 182612.

It is an arithmetic number, because the mean of its divisors is an integer number (212571711).

Almost surely, 2^9704639808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9704639808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14880019770).

9704639808 is an abundant number, since it is smaller than the sum of its proper divisors (20055399732).

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

9704639808 is a wasteful number, since it uses less digits than its factorization.

9704639808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64606 (or 64587 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 9704639808 is about 98512.1302581565. The cubic root of 9704639808 is about 2133.0112220267.

The spelling of 9704639808 in words is "nine billion, seven hundred four million, six hundred thirty-nine thousand, eight hundred eight".