8397691680 has 384 divisors, whose sum is σ = 32065044480. Its totient is φ = 1806520320.

The previous prime is 8397691639. The next prime is 8397691681. The reversal of 8397691680 is 861967938.

It is a self number, because there is not a number n which added to its sum of digits gives 8397691680.

It is not an unprimeable number, because it can be changed into a prime (8397691681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3852831 + ... + 3855009.

It is an arithmetic number, because the mean of its divisors is an integer number (83502720).

Almost surely, 2^8397691680 is an apocalyptic number.

8397691680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8397691680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16032522240).

8397691680 is an abundant number, since it is smaller than the sum of its proper divisors (23667352800).

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

8397691680 is a wasteful number, since it uses less digits than its factorization.

8397691680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 8397691680 is about 91638.9201158547. The cubic root of 8397691680 is about 2032.6064927583.

The spelling of 8397691680 in words is "eight billion, three hundred ninety-seven million, six hundred ninety-one thousand, six hundred eighty".