8999280920 has 64 divisors (see below), whose sum is σ = 23164937280. Its totient is φ = 3082277376.

The previous prime is 8999280907. The next prime is 8999280923. The reversal of 8999280920 is 290829998.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999280923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263042 + ... + 295278.

It is an arithmetic number, because the mean of its divisors is an integer number (361952145).

Almost surely, 2^8999280920 is an apocalyptic number.

It is an amenable number.

8999280920 is an abundant number, since it is smaller than the sum of its proper divisors (14165656360).

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

8999280920 is a wasteful number, since it uses less digits than its factorization.

8999280920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33252 (or 33248 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 8999280920 is about 94864.5398449811. The cubic root of 8999280920 is about 2080.0284235514.

The spelling of 8999280920 in words is "eight billion, nine hundred ninety-nine million, two hundred eighty thousand, nine hundred twenty".