4021444401 has 24 divisors (see below), whose sum is σ = 6147658080. Its totient is φ = 2329157376.

The previous prime is 4021444391. The next prime is 4021444421. The reversal of 4021444401 is 1044441204.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-4021444401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4021444421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224671 + ... + 241908.

It is an arithmetic number, because the mean of its divisors is an integer number (256152420).

Almost surely, 2^4021444401 is an apocalyptic number.

It is an amenable number.

4021444401 is a deficient number, since it is larger than the sum of its proper divisors (2126213679).

4021444401 is a wasteful number, since it uses less digits than its factorization.

4021444401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466625 (or 466612 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 4021444401 is about 63414.8594652704. The cubic root of 4021444401 is about 1590.2327363916.

Adding to 4021444401 its reverse (1044441204), we get a palindrome (5065885605).

The spelling of 4021444401 in words is "four billion, twenty-one million, four hundred forty-four thousand, four hundred one".