6722040 has 128 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 1589760.

The previous prime is 6722039. The next prime is 6722057. The reversal of 6722040 is 402276.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6721998 and 6722016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48291 + ... + 48429.

It is an arithmetic number, because the mean of its divisors is an integer number (176400).

Almost surely, 2^6722040 is an apocalyptic number.

6722040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6722040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11289600).

6722040 is an abundant number, since it is smaller than the sum of its proper divisors (15857160).

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

6722040 is a wasteful number, since it uses less digits than its factorization.

6722040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 6722040 is about 2592.6897230482. The cubic root of 6722040 is about 188.7268527087.

The spelling of 6722040 in words is "six million, seven hundred twenty-two thousand, forty".