4044240 has 120 divisors (see below), whose sum is σ = 14014728. Its totient is φ = 1044480.

The previous prime is 4044223. The next prime is 4044241. The reversal of 4044240 is 424404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 4016016 = 168^2 + 2004^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 (4044241) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 29452 + ... + 29588.

Almost surely, 2^4044240 is an apocalyptic number.

4044240 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 4044240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7007364).

4044240 is an abundant number, since it is smaller than the sum of its proper divisors (9970488).

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

4044240 is a wasteful number, since it uses less digits than its factorization.

4044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 188 counting only the distinct ones).

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

The square root of 4044240 is about 2011.0295870524. The cubic root of 4044240 is about 159.3231826932.

Adding to 4044240 its reverse (424404), we get a palindrome (4468644).

The spelling of 4044240 in words is "four million, forty-four thousand, two hundred forty".