6622440 has 128 divisors (see below), whose sum is σ = 22550400. Its totient is φ = 1541120.

The previous prime is 6622423. The next prime is 6622457. The reversal of 6622440 is 442266.

It is an interprime number because it is at equal distance from previous prime (6622423) and next prime (6622457).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6622440.

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, 38194 + ... + 38366.

It is an arithmetic number, because the mean of its divisors is an integer number (176175).

Almost surely, 2^6622440 is an apocalyptic number.

6622440 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 6622440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11275200).

6622440 is an abundant number, since it is smaller than the sum of its proper divisors (15927960).

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

6622440 is a wasteful number, since it uses less digits than its factorization.

6622440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 6622440 is about 2573.4101888350. The cubic root of 6622440 is about 187.7900931692.

The spelling of 6622440 in words is "six million, six hundred twenty-two thousand, four hundred forty".