444028323557 has 32 divisors (see below), whose sum is σ = 549647949312. Its totient is φ = 349295595264.

The previous prime is 444028323553. The next prime is 444028323559. The reversal of 444028323557 is 755323820444.

It is not a de Polignac number, because 444028323557 - 2² = 444028323553 is a prime.

It is a super-2 number, since 2×444028323557² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444028323553) 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 31 ways as a sum of consecutive naturals, for example, 28800983 + ... + 28816395.

It is an arithmetic number, because the mean of its divisors is an integer number (17176498416).

Almost surely, 2^444028323557 is an apocalyptic number.

It is an amenable number.

444028323557 is a deficient number, since it is larger than the sum of its proper divisors (105619625755).

444028323557 is a wasteful number, since it uses less digits than its factorization.

444028323557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17237.

The product of its (nonzero) digits is 3225600, while the sum is 47.

The spelling of 444028323557 in words is "four hundred forty-four billion, twenty-eight million, three hundred twenty-three thousand, five hundred fifty-seven".