444224421 has 12 divisors (see below), whose sum is σ = 642144672. Its totient is φ = 295924776.

The previous prime is 444224413. The next prime is 444224423. The reversal of 444224421 is 124422444.

It is not a de Polignac number, because 444224421 - 2³ = 444224413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444224423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5751 + ... + 30356.

It is an arithmetic number, because the mean of its divisors is an integer number (53512056).

Almost surely, 2^444224421 is an apocalyptic number.

It is an amenable number.

444224421 is a deficient number, since it is larger than the sum of its proper divisors (197920251).

444224421 is a wasteful number, since it uses less digits than its factorization.

444224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37480 (or 37477 counting only the distinct ones).

The product of its digits is 8192, while the sum is 27.

The square root of 444224421 is about 21076.6321076210. The cubic root of 444224421 is about 763.0168755969.

Adding to 444224421 its reverse (124422444), we get a palindrome (568646865).

The spelling of 444224421 in words is "four hundred forty-four million, two hundred twenty-four thousand, four hundred twenty-one".