9678840672 has 48 divisors (see below), whose sum is σ = 25412132592. Its totient is φ = 3225623040.

The previous prime is 9678840671. The next prime is 9678840727. The reversal of 9678840672 is 2760488769.

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

It is a super-3 number, since 3×9678840672³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9678840671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773022 + ... + 785442.

It is an arithmetic number, because the mean of its divisors is an integer number (529419429).

Almost surely, 2^9678840672 is an apocalyptic number.

It is an amenable number.

9678840672 is an abundant number, since it is smaller than the sum of its proper divisors (15733291920).

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

9678840672 is a wasteful number, since it uses less digits than its factorization.

9678840672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20551 (or 20543 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The square root of 9678840672 is about 98381.0991603570. The cubic root of 9678840672 is about 2131.1193886963.

The spelling of 9678840672 in words is "nine billion, six hundred seventy-eight million, eight hundred forty thousand, six hundred seventy-two".