6422240 has 96 divisors (see below), whose sum is σ = 17146080. Its totient is φ = 2252800.

The previous prime is 6422203. The next prime is 6422261. The reversal of 6422240 is 422246.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72116 + ... + 72204.

It is an arithmetic number, because the mean of its divisors is an integer number (178605).

Almost surely, 2^6422240 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 6422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8573040).

6422240 is an abundant number, since it is smaller than the sum of its proper divisors (10723840).

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

6422240 is a wasteful number, since it uses less digits than its factorization.

6422240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 6422240 is about 2534.2138820549. The cubic root of 6422240 is about 185.8783649955.

Adding to 6422240 its reverse (422246), we get a palindrome (6844486).

It can be divided in two parts, 642 and 2240, that added together give a palindrome (2882).

The spelling of 6422240 in words is "six million, four hundred twenty-two thousand, two hundred forty".