6722440 has 32 divisors (see below), whose sum is σ = 15785280. Its totient is φ = 2571712.

The previous prime is 6722423. The next prime is 6722473. The reversal of 6722440 is 442276.

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, 2734 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (493290).

Almost surely, 2^6722440 is an apocalyptic number.

It is an amenable number.

6722440 is an abundant number, since it is smaller than the sum of its proper divisors (9062840).

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

6722440 is a wasteful number, since it uses less digits than its factorization.

6722440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7341 (or 7337 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 6722440 is about 2592.7668618678. The cubic root of 6722440 is about 188.7305960785.

The spelling of 6722440 in words is "six million, seven hundred twenty-two thousand, four hundred forty".