6423720 has 64 divisors (see below), whose sum is σ = 19440000. Its totient is φ = 1698048.

The previous prime is 6423707. The next prime is 6423721. The reversal of 6423720 is 273246.

6423720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23746 + ... + 24014.

It is an arithmetic number, because the mean of its divisors is an integer number (303750).

Almost surely, 2^6423720 is an apocalyptic number.

6423720 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 6423720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9720000).

6423720 is an abundant number, since it is smaller than the sum of its proper divisors (13016280).

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

6423720 is a wasteful number, since it uses less digits than its factorization.

6423720 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 2016, while the sum is 24.

The square root of 6423720 is about 2534.5058690009. The cubic root of 6423720 is about 185.8926424049.

Adding to 6423720 its reverse (273246), we get a palindrome (6696966).

The spelling of 6423720 in words is "six million, four hundred twenty-three thousand, seven hundred twenty".