8921328440 has 32 divisors (see below), whose sum is σ = 20076191280. Its totient is φ = 3567962112.

The previous prime is 8921328433. The next prime is 8921328443. The reversal of 8921328440 is 448231298.

It is a super-2 number, since 2×8921328440² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921328443) 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, 311192 + ... + 338648.

Almost surely, 2^8921328440 is an apocalyptic number.

It is an amenable number.

8921328440 is an abundant number, since it is smaller than the sum of its proper divisors (11154862840).

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

8921328440 is a wasteful number, since it uses less digits than its factorization.

8921328440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35591 (or 35587 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 8921328440 is about 94452.7841834215. The cubic root of 8921328440 is about 2074.0052087416.

The spelling of 8921328440 in words is "eight billion, nine hundred twenty-one million, three hundred twenty-eight thousand, four hundred forty".