9928769 has 4 divisors (see below), whose sum is σ = 9944196. Its totient is φ = 9913344.

The previous prime is 9928747. The next prime is 9928783. The reversal of 9928769 is 9678299.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4048144 + 5880625 = 2012^2 + 2425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9928769 is a prime.

It is a super-2 number, since 2×9928769² = 197160907710722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6704 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (2486049).

Almost surely, 2^9928769 is an apocalyptic number.

It is an amenable number.

9928769 is a deficient number, since it is larger than the sum of its proper divisors (15427).

9928769 is a wasteful number, since it uses less digits than its factorization.

9928769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15426.

The product of its digits is 489888, while the sum is 50.

The square root of 9928769 is about 3150.9949222428. The cubic root of 9928769 is about 214.9307077947.

The spelling of 9928769 in words is "nine million, nine hundred twenty-eight thousand, seven hundred sixty-nine".