4422240 has 144 divisors (see below), whose sum is σ = 15685488. Its totient is φ = 1133568.

The previous prime is 4422221. The next prime is 4422241. The reversal of 4422240 is 422244.

4422240 is a `hidden beast` number, since 4 + 422 + 240 = 666.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4422241) 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, 53239 + ... + 53321.

It is an arithmetic number, because the mean of its divisors is an integer number (108927).

Almost surely, 2^4422240 is an apocalyptic number.

4422240 is a gapful number since it is divisible by the number (40) 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 4422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7842744).

4422240 is an abundant number, since it is smaller than the sum of its proper divisors (11263248).

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

4422240 is a wasteful number, since it uses less digits than its factorization.

4422240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4422240 is about 2102.9122663583. The cubic root of 4422240 is about 164.1398766984.

Adding to 4422240 its reverse (422244), we get a palindrome (4844484).

The spelling of 4422240 in words is "four million, four hundred twenty-two thousand, two hundred forty".