443728989 has 16 divisors (see below), whose sum is σ = 717138240. Its totient is φ = 268926480.

The previous prime is 443728981. The next prime is 443729023. The reversal of 443728989 is 989827344.

It is not a de Polignac number, because 443728989 - 2³ = 443728981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443728981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746722 + ... + 747315.

It is an arithmetic number, because the mean of its divisors is an integer number (44821140).

Almost surely, 2^443728989 is an apocalyptic number.

It is an amenable number.

443728989 is a deficient number, since it is larger than the sum of its proper divisors (273409251).

443728989 is a wasteful number, since it uses less digits than its factorization.

443728989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494057 (or 1494051 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 443728989 is about 21064.8757176490. The cubic root of 443728989 is about 762.7331124215.

It can be divided in two parts, 44372 and 8989, that added together give a square (53361 = 231²).

The spelling of 443728989 in words is "four hundred forty-three million, seven hundred twenty-eight thousand, nine hundred eighty-nine".