8918396720 has 20 divisors (see below), whose sum is σ = 20735272560. Its totient is φ = 3567358656.

The previous prime is 8918396699. The next prime is 8918396737. The reversal of 8918396720 is 276938198.

8918396720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55739900 + ... + 55740059.

It is an arithmetic number, because the mean of its divisors is an integer number (1036763628).

Almost surely, 2^8918396720 is an apocalyptic number.

8918396720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8918396720 is an abundant number, since it is smaller than the sum of its proper divisors (11816875840).

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

8918396720 is a wasteful number, since it uses less digits than its factorization.

8918396720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111479972 (or 111479966 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 8918396720 is about 94437.2634080425. The cubic root of 8918396720 is about 2073.7779978593. Note that the first 3 decimals are identical.

The spelling of 8918396720 in words is "eight billion, nine hundred eighteen million, three hundred ninety-six thousand, seven hundred twenty".