444488891 has 16 divisors (see below), whose sum is σ = 556167168. Its totient is φ = 345105600.

The previous prime is 444488879. The next prime is 444488929. The reversal of 444488891 is 198884444.

It is a happy number.

It is not a de Polignac number, because 444488891 - 2⁶ = 444488827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444488861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11366 + ... + 31908.

It is an arithmetic number, because the mean of its divisors is an integer number (34760448).

Almost surely, 2^444488891 is an apocalyptic number.

444488891 is a deficient number, since it is larger than the sum of its proper divisors (111678277).

444488891 is a wasteful number, since it uses less digits than its factorization.

444488891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20842.

The product of its digits is 1179648, while the sum is 50.

The square root of 444488891 is about 21082.9051840585. The cubic root of 444488891 is about 763.1682668235.

The spelling of 444488891 in words is "four hundred forty-four million, four hundred eighty-eight thousand, eight hundred ninety-one".