8728889 has 8 divisors (see below), whose sum is σ = 9445632. Its totient is φ = 8018640.

The previous prime is 8728883. The next prime is 8728897. The reversal of 8728889 is 9888278.

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-8728889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728883) 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, 1394 + ... + 4404.

It is an arithmetic number, because the mean of its divisors is an integer number (1180704).

Almost surely, 2^8728889 is an apocalyptic number.

It is an amenable number.

8728889 is a deficient number, since it is larger than the sum of its proper divisors (716743).

8728889 is a wasteful number, since it uses less digits than its factorization.

8728889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247.

The product of its digits is 516096, while the sum is 50.

The square root of 8728889 is about 2954.4693262919. The cubic root of 8728889 is about 205.8984087631.

The spelling of 8728889 in words is "eight million, seven hundred twenty-eight thousand, eight hundred eighty-nine".