320136904 has 8 divisors (see below), whose sum is σ = 600256710. Its totient is φ = 160068448.

The previous prime is 320136889. The next prime is 320136917. The reversal of 320136904 is 409631023.

It can be written as a sum of positive squares in only one way, i.e., 292068100 + 28068804 = 17090^2 + 5298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 20008549 + ... + 20008564.

Almost surely, 2^320136904 is an apocalyptic number.

It is an amenable number.

320136904 is a deficient number, since it is larger than the sum of its proper divisors (280119806).

320136904 is a wasteful number, since it uses less digits than its factorization.

320136904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40017119 (or 40017115 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 320136904 is about 17892.3699939388. The cubic root of 320136904 is about 684.0879074915.

Adding to 320136904 its reverse (409631023), we get a palindrome (729767927).

The spelling of 320136904 in words is "three hundred twenty million, one hundred thirty-six thousand, nine hundred four".