6909888 has 112 divisors (see below), whose sum is σ = 20299680. Its totient is φ = 2064384.

The previous prime is 6909887. The next prime is 6909899. The reversal of 6909888 is 8889096.

6909888 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94620 + ... + 94692.

Almost surely, 2^6909888 is an apocalyptic number.

6909888 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10149840).

6909888 is an abundant number, since it is smaller than the sum of its proper divisors (13389792).

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

6909888 is a wasteful number, since it uses less digits than its factorization.

6909888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 6909888 is about 2628.6665821287. Note that the first 3 decimals coincide. The cubic root of 6909888 is about 190.4687226913.

The spelling of 6909888 in words is "six million, nine hundred nine thousand, eight hundred eighty-eight".