6847440 has 80 divisors (see below), whose sum is σ = 21510528. Its totient is φ = 1801728.

The previous prime is 6847439. The next prime is 6847471. The reversal of 6847440 is 447486.

6847440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

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, 24582 + ... + 24858.

Almost surely, 2^6847440 is an apocalyptic number.

6847440 is a gapful number since it is divisible by the number (60) 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 6847440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10755264).

6847440 is an abundant number, since it is smaller than the sum of its proper divisors (14663088).

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

6847440 is a wasteful number, since it uses less digits than its factorization.

6847440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 6847440 is about 2616.7613570977. The cubic root of 6847440 is about 189.8931994422.

The spelling of 6847440 in words is "six million, eight hundred forty-seven thousand, four hundred forty".