6723420 has 96 divisors (see below), whose sum is σ = 20998656. Its totient is φ = 1593600.

The previous prime is 6723403. The next prime is 6723427. The reversal of 6723420 is 243276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6723427) 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 31 ways as a sum of consecutive naturals, for example, 40177 + ... + 40343.

It is an arithmetic number, because the mean of its divisors is an integer number (218736).

Almost surely, 2^6723420 is an apocalyptic number.

6723420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6723420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10499328).

6723420 is an abundant number, since it is smaller than the sum of its proper divisors (14275236).

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

6723420 is a wasteful number, since it uses less digits than its factorization.

6723420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 249 counting only the distinct ones).

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

The square root of 6723420 is about 2592.9558422773. The cubic root of 6723420 is about 188.7397667069.

Adding to 6723420 its reverse (243276), we get a palindrome (6966696).

The spelling of 6723420 in words is "six million, seven hundred twenty-three thousand, four hundred twenty".