8981639040 has 256 divisors, whose sum is σ = 31435257600. Its totient is φ = 2163179520.

The previous prime is 8981638993. The next prime is 8981639071. The reversal of 8981639040 is 409361898.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3441256 + ... + 3443864.

It is an arithmetic number, because the mean of its divisors is an integer number (122793975).

Almost surely, 2^8981639040 is an apocalyptic number.

8981639040 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 8981639040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15717628800).

8981639040 is an abundant number, since it is smaller than the sum of its proper divisors (22453618560).

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

8981639040 is a wasteful number, since it uses less digits than its factorization.

8981639040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805 (or 2793 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 8981639040 is about 94771.5096429301. The cubic root of 8981639040 is about 2078.6683290706.

The spelling of 8981639040 in words is "eight billion, nine hundred eighty-one million, six hundred thirty-nine thousand, forty".