320105356 has 6 divisors (see below), whose sum is σ = 560184380. Its totient is φ = 160052676.

The previous prime is 320105347. The next prime is 320105371. The reversal of 320105356 is 653501023.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 320105356.

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, 40013166 + ... + 40013173.

Almost surely, 2^320105356 is an apocalyptic number.

It is an amenable number.

320105356 is a deficient number, since it is larger than the sum of its proper divisors (240079024).

320105356 is a wasteful number, since it uses less digits than its factorization.

320105356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80026343 (or 80026341 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 320105356 is about 17891.4883673774. The cubic root of 320105356 is about 684.0654355282.

Adding to 320105356 its reverse (653501023), we get a palindrome (973606379).

The spelling of 320105356 in words is "three hundred twenty million, one hundred five thousand, three hundred fifty-six".