6840456 has 64 divisors (see below), whose sum is σ = 20582400. Its totient is φ = 1850688.

The previous prime is 6840439. The next prime is 6840461. The reversal of 6840456 is 6540486.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (321600).

Almost surely, 2^6840456 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 6840456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10291200).

6840456 is an abundant number, since it is smaller than the sum of its proper divisors (13741944).

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

6840456 is a wasteful number, since it uses less digits than its factorization.

6840456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178 (or 2174 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6840456 is about 2615.4265426504. The cubic root of 6840456 is about 189.8286173868.

The spelling of 6840456 in words is "six million, eight hundred forty thousand, four hundred fifty-six".