8391487960 has 64 divisors (see below), whose sum is σ = 19639065600. Its totient is φ = 3223459200.

The previous prime is 8391487943. The next prime is 8391487961. The reversal of 8391487960 is 697841938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391487961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136611 + ... + 188269.

It is an arithmetic number, because the mean of its divisors is an integer number (306860400).

Almost surely, 2^8391487960 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 8391487960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9819532800).

8391487960 is an abundant number, since it is smaller than the sum of its proper divisors (11247577640).

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

8391487960 is a wasteful number, since it uses less digits than its factorization.

8391487960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51832 (or 51828 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 8391487960 is about 91605.0651438009. The cubic root of 8391487960 is about 2032.1058461356.

The spelling of 8391487960 in words is "eight billion, three hundred ninety-one million, four hundred eighty-seven thousand, nine hundred sixty".