6915920 has 80 divisors (see below), whose sum is σ = 18213120. Its totient is φ = 2419200.

The previous prime is 6915913. The next prime is 6915967. The reversal of 6915920 is 295196.

It is a tau number, because it is divible by the number of its divisors (80).

6915920 is a Rhonda number in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25385 + ... + 25655.

It is an arithmetic number, because the mean of its divisors is an integer number (227664).

Almost surely, 2^6915920 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 6915920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9106560).

6915920 is an abundant number, since it is smaller than the sum of its proper divisors (11297200).

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

6915920 is a wasteful number, since it uses less digits than its factorization.

6915920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 6915920 is about 2629.8136816132. The cubic root of 6915920 is about 190.5241299176.

The spelling of 6915920 in words is "six million, nine hundred fifteen thousand, nine hundred twenty".