444504021 has 8 divisors (see below), whose sum is σ = 638262240. Its totient is φ = 273540912.

The previous prime is 444504017. The next prime is 444504023. The reversal of 444504021 is 120405444.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 444504021 - 2² = 444504017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 444503982 and 444504000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444504023) 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 7 ways as a sum of consecutive naturals, for example, 5698731 + ... + 5698808.

It is an arithmetic number, because the mean of its divisors is an integer number (79782780).

Almost surely, 2^444504021 is an apocalyptic number.

It is an amenable number.

444504021 is a deficient number, since it is larger than the sum of its proper divisors (193758219).

444504021 is a wasteful number, since it uses less digits than its factorization.

444504021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11397555.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 444504021 is about 21083.2640025211. The cubic root of 444504021 is about 763.1769259112.

Adding to 444504021 its reverse (120405444), we get a palindrome (564909465).

The spelling of 444504021 in words is "four hundred forty-four million, five hundred four thousand, twenty-one".