8821505280 has 432 divisors, whose sum is σ = 33084543744. Its totient is φ = 1997291520.

The previous prime is 8821505267. The next prime is 8821505321. The reversal of 8821505280 is 825051288.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32551545 + ... + 32551815.

It is an arithmetic number, because the mean of its divisors is an integer number (76584592).

Almost surely, 2^8821505280 is an apocalyptic number.

8821505280 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 8821505280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16542271872).

8821505280 is an abundant number, since it is smaller than the sum of its proper divisors (24263038464).

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

8821505280 is a wasteful number, since it uses less digits than its factorization.

8821505280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 8821505280 is about 93922.8687807181. The cubic root of 8821505280 is about 2066.2406410549.

The spelling of 8821505280 in words is "eight billion, eight hundred twenty-one million, five hundred five thousand, two hundred eighty".