6844240 has 40 divisors (see below), whose sum is σ = 17139528. Its totient is φ = 2526720.

The previous prime is 6844231. The next prime is 6844249. The reversal of 6844240 is 424486.

It is an interprime number because it is at equal distance from previous prime (6844231) and next prime (6844249).

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 6843456 = 28^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 6844199 and 6844208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6844249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 4330.

Almost surely, 2^6844240 is an apocalyptic number.

It is an amenable number.

6844240 is an abundant number, since it is smaller than the sum of its proper divisors (10295288).

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

6844240 is a wasteful number, since it uses less digits than its factorization.

6844240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607 (or 6601 counting only the distinct ones).

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

The square root of 6844240 is about 2616.1498428034. The cubic root of 6844240 is about 189.8636140341.

The spelling of 6844240 in words is "six million, eight hundred forty-four thousand, two hundred forty".