444428 has 12 divisors (see below), whose sum is σ = 784392. Its totient is φ = 220320.

The previous prime is 444421. The next prime is 444443. The reversal of 444428 is 824444.

It is a junction number, because it is equal to n+sod(n) for n = 444397 and 444406.

It is not an unprimeable number, because it can be changed into a prime (444421) by changing a digit.

444428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (65366).

2⁴⁴⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

444428 is a deficient number, since it is larger than the sum of its proper divisors (339964).

444428 is a wasteful number, since it uses less digits than its factorization.

444428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 950 counting only the distinct ones).

The product of its digits is 4096, while the sum is 26.

The square root of 444428 is about 666.6543332192. The cubic root of 444428 is about 76.3133416158.

The spelling of 444428 in words is "four hundred forty-four thousand, four hundred twenty-eight".