8728999 has 4 divisors (see below), whose sum is σ = 9188440. Its totient is φ = 8269560.

The previous prime is 8728987. The next prime is 8729033. The reversal of 8728999 is 9998278.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8728999 - 2¹³ = 8720807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728969) 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 3 ways as a sum of consecutive naturals, for example, 229692 + ... + 229729.

It is an arithmetic number, because the mean of its divisors is an integer number (2297110).

Almost surely, 2^8728999 is an apocalyptic number.

8728999 is a deficient number, since it is larger than the sum of its proper divisors (459441).

8728999 is a wasteful number, since it uses less digits than its factorization.

8728999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459440.

The product of its digits is 653184, while the sum is 52.

The square root of 8728999 is about 2954.4879420976. The cubic root of 8728999 is about 205.8992736585.

The spelling of 8728999 in words is "eight million, seven hundred twenty-eight thousand, nine hundred ninety-nine".