7928920 has 16 divisors (see below), whose sum is σ = 17840160. Its totient is φ = 3171552.

The previous prime is 7928911. The next prime is 7928923. The reversal of 7928920 is 298297.

It is a self number, because there is not a number n which added to its sum of digits gives 7928920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99072 + ... + 99151.

It is an arithmetic number, because the mean of its divisors is an integer number (1115010).

Almost surely, 2^7928920 is an apocalyptic number.

It is an amenable number.

7928920 is an abundant number, since it is smaller than the sum of its proper divisors (9911240).

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

7928920 is a wasteful number, since it uses less digits than its factorization.

7928920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198234 (or 198230 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 7928920 is about 2815.8338019137. The cubic root of 7928920 is about 199.4059036618.

The spelling of 7928920 in words is "seven million, nine hundred twenty-eight thousand, nine hundred twenty".