8997728443 has 8 divisors (see below), whose sum is σ = 9872444016. Its totient is φ = 8132469600.

The previous prime is 8997728423. The next prime is 8997728447. The reversal of 8997728443 is 3448277998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8997728443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8997728447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2362188 + ... + 2365993.

It is an arithmetic number, because the mean of its divisors is an integer number (1234055502).

Almost surely, 2^8997728443 is an apocalyptic number.

8997728443 is a deficient number, since it is larger than the sum of its proper divisors (874715573).

8997728443 is a wasteful number, since it uses less digits than its factorization.

8997728443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728365.

The product of its digits is 24385536, while the sum is 61.

The square root of 8997728443 is about 94856.3568929358. The cubic root of 8997728443 is about 2079.9088072538.

The spelling of 8997728443 in words is "eight billion, nine hundred ninety-seven million, seven hundred twenty-eight thousand, four hundred forty-three".