444445557 has 8 divisors (see below), whose sum is σ = 594689184. Its totient is φ = 295249488.

The previous prime is 444445531. The next prime is 444445559. The reversal of 444445557 is 755544444.

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

It is not a de Polignac number, because 444445557 - 2⁶ = 444445493 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444445559) 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, 260898 + ... + 262595.

It is an arithmetic number, because the mean of its divisors is an integer number (74336148).

Almost surely, 2^444445557 is an apocalyptic number.

It is an amenable number.

444445557 is a deficient number, since it is larger than the sum of its proper divisors (150243627).

444445557 is a wasteful number, since it uses less digits than its factorization.

444445557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523779.

The product of its digits is 896000, while the sum is 42.

The square root of 444445557 is about 21081.8774543445. The cubic root of 444445557 is about 763.1434651475.

The spelling of 444445557 in words is "four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-seven".