4043440 has 20 divisors (see below), whose sum is σ = 9401184. Its totient is φ = 1617344.

The previous prime is 4043437. The next prime is 4043443. The reversal of 4043440 is 443404.

It is an interprime number because it is at equal distance from previous prime (4043437) and next prime (4043443).

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (4043443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25192 + ... + 25351.

Almost surely, 2^4043440 is an apocalyptic number.

4043440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4043440 is an abundant number, since it is smaller than the sum of its proper divisors (5357744).

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

4043440 is a wasteful number, since it uses less digits than its factorization.

4043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50556 (or 50550 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 4043440 is about 2010.8306741245. The cubic root of 4043440 is about 159.3126766442.

Adding to 4043440 its reverse (443404), we get a palindrome (4486844).

It can be divided in two parts, 404 and 3440, that added together give a square (3844 = 62²).

The spelling of 4043440 in words is "four million, forty-three thousand, four hundred forty".