4000440421 has 8 divisors (see below), whose sum is σ = 4042450944. Its totient is φ = 3958477200.

The previous prime is 4000440413. The next prime is 4000440427. The reversal of 4000440421 is 1240440004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4000440421 - 2³ = 4000440413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000440427) 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, 173260 + ... + 194986.

It is an arithmetic number, because the mean of its divisors is an integer number (505306368).

Almost surely, 2^4000440421 is an apocalyptic number.

It is an amenable number.

4000440421 is a deficient number, since it is larger than the sum of its proper divisors (42010523).

4000440421 is a wasteful number, since it uses less digits than its factorization.

4000440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23651.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 4000440421 is about 63249.0349412542. The cubic root of 4000440421 is about 1587.4593102266.

Adding to 4000440421 its reverse (1240440004), we get a palindrome (5240880425).

The spelling of 4000440421 in words is "four billion, four hundred forty thousand, four hundred twenty-one".