8000440128 has 84 divisors (see below), whose sum is σ = 23154627808. Its totient is φ = 2640902400.

The previous prime is 8000440093. The next prime is 8000440199. The reversal of 8000440128 is 8210440008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8098 + ... + 126753.

Almost surely, 2^8000440128 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 8000440128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11577313904).

8000440128 is an abundant number, since it is smaller than the sum of its proper divisors (15154187680).

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

8000440128 is a wasteful number, since it uses less digits than its factorization.

8000440128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134972 (or 134959 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 8000440128 is about 89445.1794564693. The cubic root of 8000440128 is about 2000.0366766607.

The spelling of 8000440128 in words is "eight billion, four hundred forty thousand, one hundred twenty-eight".