440933361989 has 4 divisors (see below), whose sum is σ = 440951406540. Its totient is φ = 440915317440.

The previous prime is 440933361977. The next prime is 440933361991. The reversal of 440933361989 is 989163339044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210826068964 + 230107293025 = 459158^2 + 479695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440933361989 is a prime.

It is a super-2 number, since 2×440933361989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440933361929) 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 3 ways as a sum of consecutive naturals, for example, 8985572 + ... + 9034509.

It is an arithmetic number, because the mean of its divisors is an integer number (110237851635).

Almost surely, 2^440933361989 is an apocalyptic number.

It is an amenable number.

440933361989 is a deficient number, since it is larger than the sum of its proper divisors (18044551).

440933361989 is a wasteful number, since it uses less digits than its factorization.

440933361989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044550.

The product of its (nonzero) digits is 15116544, while the sum is 59.

The spelling of 440933361989 in words is "four hundred forty billion, nine hundred thirty-three million, three hundred sixty-one thousand, nine hundred eighty-nine".