9928040 has 16 divisors (see below), whose sum is σ = 22338180. Its totient is φ = 3971200.

The previous prime is 9928021. The next prime is 9928043. The reversal of 9928040 is 408299.

It can be written as a sum of positive squares in 2 ways, for example, as 9721924 + 206116 = 3118^2 + 454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9927988 and 9928006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928043) 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, 124061 + ... + 124140.

Almost surely, 2^9928040 is an apocalyptic number.

It is an amenable number.

9928040 is an abundant number, since it is smaller than the sum of its proper divisors (12410140).

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

9928040 is a wasteful number, since it uses less digits than its factorization.

9928040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248212 (or 248208 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 9928040 is about 3150.8792423703. The cubic root of 9928040 is about 214.9254473802.

The spelling of 9928040 in words is "nine million, nine hundred twenty-eight thousand, forty".