309445843444 has 6 divisors (see below), whose sum is σ = 541530226034. Its totient is φ = 154722921720.

The previous prime is 309445843433. The next prime is 309445843453. The reversal of 309445843444 is 444348544903.

It can be written as a sum of positive squares in only one way, i.e., 300808371600 + 8637471844 = 548460^2 + 92938^2 .

It is a super-2 number, since 2×309445843444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 309445843391 and 309445843400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38680730427 + ... + 38680730434.

Almost surely, 2^309445843444 is an apocalyptic number.

It is an amenable number.

309445843444 is a deficient number, since it is larger than the sum of its proper divisors (232084382590).

309445843444 is a wasteful number, since it uses less digits than its factorization.

309445843444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77361460865 (or 77361460863 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 52.

The spelling of 309445843444 in words is "three hundred nine billion, four hundred forty-five million, eight hundred forty-three thousand, four hundred forty-four".