6423140 has 24 divisors (see below), whose sum is σ = 14199360. Its totient is φ = 2433888.

The previous prime is 6423119. The next prime is 6423149. The reversal of 6423140 is 413246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (6423149) 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 7 ways as a sum of consecutive naturals, for example, 8072 + ... + 8831.

It is an arithmetic number, because the mean of its divisors is an integer number (591640).

Almost surely, 2^6423140 is an apocalyptic number.

It is an amenable number.

6423140 is an abundant number, since it is smaller than the sum of its proper divisors (7776220).

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

6423140 is a wasteful number, since it uses less digits than its factorization.

6423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16931 (or 16929 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6423140 is about 2534.3914456926. The cubic root of 6423140 is about 185.8870474653.

Adding to 6423140 its reverse (413246), we get a palindrome (6836386).

The spelling of 6423140 in words is "six million, four hundred twenty-three thousand, one hundred forty".