6620320 has 96 divisors (see below), whose sum is σ = 18724608. Its totient is φ = 2162688.

The previous prime is 6620309. The next prime is 6620351. The reversal of 6620320 is 230266.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25632 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (195048).

Almost surely, 2^6620320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6620320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9362304).

6620320 is an abundant number, since it is smaller than the sum of its proper divisors (12104288).

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

6620320 is a wasteful number, since it uses less digits than its factorization.

6620320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 6620320 is about 2572.9982510682. The cubic root of 6620320 is about 187.7700523440.

Adding to 6620320 its reverse (230266), we get a palindrome (6850586).

The spelling of 6620320 in words is "six million, six hundred twenty thousand, three hundred twenty".