6722240 has 56 divisors (see below), whose sum is σ = 18300192. Its totient is φ = 2304000.

The previous prime is 6722239. The next prime is 6722263. The reversal of 6722240 is 422276.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740 + ... + 3740.

Almost surely, 2^6722240 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 6722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9150096).

6722240 is an abundant number, since it is smaller than the sum of its proper divisors (11577952).

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

6722240 is a wasteful number, since it uses less digits than its factorization.

6722240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025 (or 3015 counting only the distinct ones).

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

The square root of 6722240 is about 2592.7282927449. The cubic root of 6722240 is about 188.7287244122.

The spelling of 6722240 in words is "six million, seven hundred twenty-two thousand, two hundred forty".