8999063280 has 80 divisors (see below), whose sum is σ = 30996780960. Its totient is φ = 2399749632.

The previous prime is 8999063273. The next prime is 8999063321. The reversal of 8999063280 is 823609998.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2080957 + ... + 2085276.

It is an arithmetic number, because the mean of its divisors is an integer number (387459762).

Almost surely, 2^8999063280 is an apocalyptic number.

8999063280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8999063280 is an abundant number, since it is smaller than the sum of its proper divisors (21997717680).

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

8999063280 is a wasteful number, since it uses less digits than its factorization.

8999063280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166255 (or 4166243 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 8999063280 is about 94863.3927287023. The cubic root of 8999063280 is about 2080.0116555067.

The spelling of 8999063280 in words is "eight billion, nine hundred ninety-nine million, sixty-three thousand, two hundred eighty".