6222240 has 144 divisors (see below), whose sum is σ = 22113000. Its totient is φ = 1591296.

The previous prime is 6222233. The next prime is 6222241. The reversal of 6222240 is 422226.

It is a happy number.

6222240 is a `hidden beast` number, since 622 + 2 + 2 + 40 = 666.

6222240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3825936 + 2396304 = 1956^2 + 1548^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (6222241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41686 + ... + 41834.

Almost surely, 2^6222240 is an apocalyptic number.

6222240 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 6222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11056500).

6222240 is an abundant number, since it is smaller than the sum of its proper divisors (15890760).

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

6222240 is a wasteful number, since it uses less digits than its factorization.

6222240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 6222240 is about 2494.4418213300. The cubic root of 6222240 is about 183.9284535950.

Adding to 6222240 its reverse (422226), we get a palindrome (6644466).

The spelling of 6222240 in words is "six million, two hundred twenty-two thousand, two hundred forty".