9928820 has 24 divisors (see below), whose sum is σ = 22746528. Its totient is φ = 3610400.

The previous prime is 9928813. The next prime is 9928843. The reversal of 9928820 is 288299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22346 + ... + 22785.

It is an arithmetic number, because the mean of its divisors is an integer number (947772).

Almost surely, 2^9928820 is an apocalyptic number.

It is an amenable number.

9928820 is an abundant number, since it is smaller than the sum of its proper divisors (12817708).

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

9928820 is a wasteful number, since it uses less digits than its factorization.

9928820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45151 (or 45149 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 9928820 is about 3151.0030149145. The cubic root of 9928820 is about 214.9310757976.

It can be divided in two parts, 9 and 928820, that added together give a palindrome (928829).

The spelling of 9928820 in words is "nine million, nine hundred twenty-eight thousand, eight hundred twenty".