6423818 has 4 divisors (see below), whose sum is σ = 9635730. Its totient is φ = 3211908.

The previous prime is 6423811. The next prime is 6423821. The reversal of 6423818 is 8183246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4012009 + 2411809 = 2003^2 + 1553^2 .

It is a d-powerful number, because it can be written as 6⁵ + 4¹¹ + 2²¹ + 3¹⁰ + 8⁵ + 1 + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (6423811) 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 as a sum of consecutive naturals, namely, 1605953 + ... + 1605956.

Almost surely, 2^6423818 is an apocalyptic number.

6423818 is a deficient number, since it is larger than the sum of its proper divisors (3211912).

6423818 is a wasteful number, since it uses less digits than its factorization.

6423818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211911.

The product of its digits is 9216, while the sum is 32.

The square root of 6423818 is about 2534.5252020842. The cubic root of 6423818 is about 185.8935877235.

The spelling of 6423818 in words is "six million, four hundred twenty-three thousand, eight hundred eighteen".