839944445 has 8 divisors (see below), whose sum is σ = 1008507480. Its totient is φ = 671572800.

The previous prime is 839944423. The next prime is 839944453. The reversal of 839944445 is 544449938.

It can be written as a sum of positive squares in 4 ways, for example, as 315488644 + 524455801 = 17762^2 + 22901^2 .

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

It is not a de Polignac number, because 839944445 - 2¹⁰ = 839943421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 839944393 and 839944402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38006 + ... + 55895.

It is an arithmetic number, because the mean of its divisors is an integer number (126063435).

Almost surely, 2^839944445 is an apocalyptic number.

It is an amenable number.

839944445 is a deficient number, since it is larger than the sum of its proper divisors (168563035).

839944445 is a wasteful number, since it uses less digits than its factorization.

839944445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95695.

The product of its digits is 2488320, while the sum is 50.

The square root of 839944445 is about 28981.7950617280. The cubic root of 839944445 is about 943.5179946929.

The spelling of 839944445 in words is "eight hundred thirty-nine million, nine hundred forty-four thousand, four hundred forty-five".