4001440404 has 24 divisors (see below), whose sum is σ = 10054901920. Its totient is φ = 1231212384.

The previous prime is 4001440393. The next prime is 4001440409. The reversal of 4001440404 is 4040441004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001440409) 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 7 ways as a sum of consecutive naturals, for example, 12824974 + ... + 12825285.

Almost surely, 2^4001440404 is an apocalyptic number.

It is an amenable number.

4001440404 is an abundant number, since it is smaller than the sum of its proper divisors (6053461516).

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

4001440404 is a wasteful number, since it uses less digits than its factorization.

4001440404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25650279 (or 25650277 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 4001440404 is about 63256.9395718762. The cubic root of 4001440404 is about 1587.5915706701.

Adding to 4001440404 its reverse (4040441004), we get a palindrome (8041881408).

The spelling of 4001440404 in words is "four billion, one million, four hundred forty thousand, four hundred four".