444444111 has 72 divisors (see below), whose sum is σ = 732127760. Its totient is φ = 266245056.

The previous prime is 444444103. The next prime is 444444149. The reversal of 444444111 is 111444444.

It is not a de Polignac number, because 444444111 - 2³ = 444444103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444444101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12011985 + ... + 12012021.

Almost surely, 2^444444111 is an apocalyptic number.

444444111 is a deficient number, since it is larger than the sum of its proper divisors (287683649).

444444111 is a wasteful number, since it uses less digits than its factorization.

444444111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 92 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 444444111 is about 21081.8431594583. The cubic root of 444444111 is about 763.1426375195.

Adding to 444444111 its reverse (111444444), we get a palindrome (555888555).

The spelling of 444444111 in words is "four hundred forty-four million, four hundred forty-four thousand, one hundred eleven".