6744840 has 32 divisors (see below), whose sum is σ = 20234880. Its totient is φ = 1798592.

The previous prime is 6744827. The next prime is 6744847. The reversal of 6744840 is 484476.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6744847) 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, 27984 + ... + 28223.

It is an arithmetic number, because the mean of its divisors is an integer number (632340).

Almost surely, 2^6744840 is an apocalyptic number.

6744840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6744840 is an abundant number, since it is smaller than the sum of its proper divisors (13490040).

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

6744840 is a wasteful number, since it uses less digits than its factorization.

6744840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56221 (or 56217 counting only the distinct ones).

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

The square root of 6744840 is about 2597.0829790363. The cubic root of 6744840 is about 188.9399882256.

The spelling of 6744840 in words is "six million, seven hundred forty-four thousand, eight hundred forty".