4000440440 has 32 divisors (see below), whose sum is σ = 9009107280. Its totient is φ = 1598733312.

The previous prime is 4000440427. The next prime is 4000440449. The reversal of 4000440440 is 440440004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000440449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392 + ... + 89448.

Almost surely, 2^4000440440 is an apocalyptic number.

4000440440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000440440 is an abundant number, since it is smaller than the sum of its proper divisors (5008666840).

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

4000440440 is a wasteful number, since it uses less digits than its factorization.

4000440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90191 (or 90187 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4000440440 is about 63249.0350914542. The cubic root of 4000440440 is about 1587.4593127398.

Adding to 4000440440 its reverse (440440004), we get a palindrome (4440880444).

The spelling of 4000440440 in words is "four billion, four hundred forty thousand, four hundred forty".