6730440 has 32 divisors (see below), whose sum is σ = 20191680. Its totient is φ = 1794752.

The previous prime is 6730391. The next prime is 6730463. The reversal of 6730440 is 440376.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6730440.

It is an unprimeable number.

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, 27924 + ... + 28163.

It is an arithmetic number, because the mean of its divisors is an integer number (630990).

Almost surely, 2^6730440 is an apocalyptic number.

6730440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6730440 is an abundant number, since it is smaller than the sum of its proper divisors (13461240).

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

6730440 is a wasteful number, since it uses less digits than its factorization.

6730440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56101 (or 56097 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 6730440 is about 2594.3091565964. The cubic root of 6730440 is about 188.8054323104.

Subtracting from 6730440 its reverse (440376), we obtain a square (6290064 = 2508²).

The spelling of 6730440 in words is "six million, seven hundred thirty thousand, four hundred forty".