9734643920 has 80 divisors (see below), whose sum is σ = 23885167680. Its totient is φ = 3679488000.

The previous prime is 9734643911. The next prime is 9734643923. The reversal of 9734643920 is 293464379.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9734643923) by changing a digit.

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, 601535 + ... + 617505.

It is an arithmetic number, because the mean of its divisors is an integer number (298564596).

Almost surely, 2^9734643920 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 9734643920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11942583840).

9734643920 is an abundant number, since it is smaller than the sum of its proper divisors (14150523760).

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

9734643920 is a wasteful number, since it uses less digits than its factorization.

9734643920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16404 (or 16398 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 9734643920 is about 98664.2991157389. The cubic root of 9734643920 is about 2135.2071910328.

The spelling of 9734643920 in words is "nine billion, seven hundred thirty-four million, six hundred forty-three thousand, nine hundred twenty".