6722144 has 72 divisors (see below), whose sum is σ = 15771672. Its totient is φ = 2795520.

The previous prime is 6722137. The next prime is 6722153. The reversal of 6722144 is 4412276.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59432 + ... + 59544.

It is an arithmetic number, because the mean of its divisors is an integer number (219051).

Almost surely, 2^6722144 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 6722144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7885836).

6722144 is an abundant number, since it is smaller than the sum of its proper divisors (9049528).

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

6722144 is a wasteful number, since it uses less digits than its factorization.

6722144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 139 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 6722144 is about 2592.7097793621. The cubic root of 6722144 is about 188.7278259992.

The spelling of 6722144 in words is "six million, seven hundred twenty-two thousand, one hundred forty-four".