6628393 has 4 divisors (see below), whose sum is σ = 6916608. Its totient is φ = 6340180.

The previous prime is 6628379. The next prime is 6628403. The reversal of 6628393 is 3938266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-6628393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6628313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144073 + ... + 144118.

It is an arithmetic number, because the mean of its divisors is an integer number (1729152).

Almost surely, 2^6628393 is an apocalyptic number.

It is an amenable number.

6628393 is a deficient number, since it is larger than the sum of its proper divisors (288215).

6628393 is a wasteful number, since it uses less digits than its factorization.

6628393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288214.

The product of its digits is 46656, while the sum is 37.

The square root of 6628393 is about 2574.5665654630. The cubic root of 6628393 is about 187.8463453271.

It can be divided in two parts, 6628 and 393, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 6628393 in words is "six million, six hundred twenty-eight thousand, three hundred ninety-three".