4440400421 has 8 divisors (see below), whose sum is σ = 4515943104. Its totient is φ = 4365219040.

The previous prime is 4440400403. The next prime is 4440400423. The reversal of 4440400421 is 1240040444.

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 4440400421 - 2²⁶ = 4373291557 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 (4440400423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65480 + ... + 114753.

It is an arithmetic number, because the mean of its divisors is an integer number (564492888).

Almost surely, 2^4440400421 is an apocalyptic number.

It is an amenable number.

4440400421 is a deficient number, since it is larger than the sum of its proper divisors (75542683).

4440400421 is a wasteful number, since it uses less digits than its factorization.

4440400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180651.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 4440400421 is about 66636.3295882959. The cubic root of 4440400421 is about 1643.6425605903.

Adding to 4440400421 its reverse (1240040444), we get a palindrome (5680440865).

The spelling of 4440400421 in words is "four billion, four hundred forty million, four hundred thousand, four hundred twenty-one".