6623138 has 8 divisors (see below), whose sum is σ = 9978780. Its totient is φ = 3296880.

The previous prime is 6623131. The next prime is 6623159. The reversal of 6623138 is 8313266.

It can be written as a sum of positive squares in 2 ways, for example, as 6620329 + 2809 = 2573^2 + 53^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6623138.

It is not an unprimeable number, because it can be changed into a prime (6623131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6773 + ... + 7688.

Almost surely, 2^6623138 is an apocalyptic number.

6623138 is a deficient number, since it is larger than the sum of its proper divisors (3355642).

6623138 is a wasteful number, since it uses less digits than its factorization.

6623138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14692.

The product of its digits is 5184, while the sum is 29.

The square root of 6623138 is about 2573.5458029730. The cubic root of 6623138 is about 187.7966905804.

The spelling of 6623138 in words is "six million, six hundred twenty-three thousand, one hundred thirty-eight".