6909920 has 48 divisors (see below), whose sum is σ = 17191440. Its totient is φ = 2617344.

The previous prime is 6909919. The next prime is 6909923. The reversal of 6909920 is 299096.

6909920 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909923) 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 7 ways as a sum of consecutive naturals, for example, 1904 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (358155).

Almost surely, 2^6909920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8595720).

6909920 is an abundant number, since it is smaller than the sum of its proper divisors (10281520).

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

6909920 is a wasteful number, since it uses less digits than its factorization.

6909920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 6909920 is about 2628.6726688578. The cubic root of 6909920 is about 190.4690167140.

The spelling of 6909920 in words is "six million, nine hundred nine thousand, nine hundred twenty".