6328621 has 4 divisors (see below), whose sum is σ = 6815452. Its totient is φ = 5841792.

The previous prime is 6328613. The next prime is 6328627. The reversal of 6328621 is 1268236.

6328621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3960100 + 2368521 = 1990^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 6328621 - 2³ = 6328613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6328621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6328627) 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, 243396 + ... + 243421.

It is an arithmetic number, because the mean of its divisors is an integer number (1703863).

Almost surely, 2^6328621 is an apocalyptic number.

It is an amenable number.

6328621 is a deficient number, since it is larger than the sum of its proper divisors (486831).

6328621 is a wasteful number, since it uses less digits than its factorization.

6328621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486830.

The product of its digits is 3456, while the sum is 28.

The square root of 6328621 is about 2515.6750585082. The cubic root of 6328621 is about 184.9707380063.

The spelling of 6328621 in words is "six million, three hundred twenty-eight thousand, six hundred twenty-one".