6740840 has 64 divisors (see below), whose sum is σ = 16796160. Its totient is φ = 2421760.

The previous prime is 6740831. The next prime is 6740843. The reversal of 6740840 is 480476.

6740840 = T₃₅₅ + T₃₅₆ + ... + T₄₃₉.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6740843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15425 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (262440).

Almost surely, 2^6740840 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 6740840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8398080).

6740840 is an abundant number, since it is smaller than the sum of its proper divisors (10055320).

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

6740840 is a wasteful number, since it uses less digits than its factorization.

6740840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 6740840 is about 2596.3127700645. The cubic root of 6740840 is about 188.9026308085.

The spelling of 6740840 in words is "six million, seven hundred forty thousand, eight hundred forty".