320135444 has 6 divisors (see below), whose sum is σ = 560237034. Its totient is φ = 160067720.

The previous prime is 320135429. The next prime is 320135467. The reversal of 320135444 is 444531023.

It can be written as a sum of positive squares in only one way, i.e., 179238544 + 140896900 = 13388^2 + 11870^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40016927 + ... + 40016934.

It is an arithmetic number, because the mean of its divisors is an integer number (93372839).

Almost surely, 2^320135444 is an apocalyptic number.

It is an amenable number.

320135444 is a deficient number, since it is larger than the sum of its proper divisors (240101590).

320135444 is a wasteful number, since it uses less digits than its factorization.

320135444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80033865 (or 80033863 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 320135444 is about 17892.3291943782. The cubic root of 320135444 is about 684.0868675511.

Adding to 320135444 its reverse (444531023), we get a palindrome (764666467).

The spelling of 320135444 in words is "three hundred twenty million, one hundred thirty-five thousand, four hundred forty-four".