8128445280 has 192 divisors, whose sum is σ = 27206419968. Its totient is φ = 2032885760.

The previous prime is 8128445279. The next prime is 8128445317. The reversal of 8128445280 is 825448218.

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, 2536159 + ... + 2539361.

It is an arithmetic number, because the mean of its divisors is an integer number (141700104).

Almost surely, 2^8128445280 is an apocalyptic number.

8128445280 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 8128445280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13603209984).

8128445280 is an abundant number, since it is smaller than the sum of its proper divisors (19077974688).

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

8128445280 is a wasteful number, since it uses less digits than its factorization.

8128445280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549 (or 3541 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 42.

The square root of 8128445280 is about 90157.8908360217. The cubic root of 8128445280 is about 2010.6469935206.

The spelling of 8128445280 in words is "eight billion, one hundred twenty-eight million, four hundred forty-five thousand, two hundred eighty".