6824440 has 32 divisors (see below), whose sum is σ = 17549280. Its totient is φ = 2339712.

The previous prime is 6824423. The next prime is 6824443. The reversal of 6824440 is 444286.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 6824399 and 6824408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6824443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11907 + ... + 12466.

It is an arithmetic number, because the mean of its divisors is an integer number (548415).

Almost surely, 2^6824440 is an apocalyptic number.

It is an amenable number.

6824440 is an abundant number, since it is smaller than the sum of its proper divisors (10724840).

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

6824440 is a wasteful number, since it uses less digits than its factorization.

6824440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24391 (or 24387 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 6824440 is about 2612.3629150637. The cubic root of 6824440 is about 189.6803489556.

The spelling of 6824440 in words is "six million, eight hundred twenty-four thousand, four hundred forty".