8687639040 has 320 divisors, whose sum is σ = 30257884800. Its totient is φ = 2118057984.

The previous prime is 8687639003. The next prime is 8687639041. The reversal of 8687639040 is 409367868.

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (8687639041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4230654 + ... + 4232706.

It is an arithmetic number, because the mean of its divisors is an integer number (94555890).

Almost surely, 2^8687639040 is an apocalyptic number.

8687639040 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 8687639040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15128942400).

8687639040 is an abundant number, since it is smaller than the sum of its proper divisors (21570245760).

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

8687639040 is a wasteful number, since it uses less digits than its factorization.

8687639040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 8687639040 is about 93207.5052772039. The cubic root of 8687639040 is about 2055.7355966166.

The spelling of 8687639040 in words is "eight billion, six hundred eighty-seven million, six hundred thirty-nine thousand, forty".