6422720 has 28 divisors (see below), whose sum is σ = 15294864. Its totient is φ = 2568960.

The previous prime is 6422711. The next prime is 6422729. The reversal of 6422720 is 272246.

It is an interprime number because it is at equal distance from previous prime (6422711) and next prime (6422729).

It is not an unprimeable number, because it can be changed into a prime (6422729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9716 + ... + 10355.

Almost surely, 2^6422720 is an apocalyptic number.

It is an amenable number.

6422720 is an abundant number, since it is smaller than the sum of its proper divisors (8872144).

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

6422720 is a wasteful number, since it uses less digits than its factorization.

6422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20088 (or 20078 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 6422720 is about 2534.3085842099. The cubic root of 6422720 is about 185.8829957470.

Adding to 6422720 its reverse (272246), we get a palindrome (6694966).

The spelling of 6422720 in words is "six million, four hundred twenty-two thousand, seven hundred twenty".