6722428 has 24 divisors (see below), whose sum is σ = 12474000. Its totient is φ = 3161088.

The previous prime is 6722423. The next prime is 6722473. The reversal of 6722428 is 8242276.

It is a self number, because there is not a number n which added to its sum of digits gives 6722428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14748 + ... + 15196.

It is an arithmetic number, because the mean of its divisors is an integer number (519750).

Almost surely, 2^6722428 is an apocalyptic number.

It is an amenable number.

6722428 is a deficient number, since it is larger than the sum of its proper divisors (5751572).

6722428 is a wasteful number, since it uses less digits than its factorization.

6722428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 6722428 is about 2592.7645477366. The cubic root of 6722428 is about 188.7304837796.

The spelling of 6722428 in words is "six million, seven hundred twenty-two thousand, four hundred twenty-eight".