320985775 has 36 divisors (see below), whose sum is σ = 452705400. Its totient is φ = 225332800.

The previous prime is 320985773. The next prime is 320985779. The reversal of 320985775 is 577589023.

It is not a de Polignac number, because 320985775 - 2¹ = 320985773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320985773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85896 + ... + 89554.

It is an arithmetic number, because the mean of its divisors is an integer number (12575150).

Almost surely, 2^320985775 is an apocalyptic number.

320985775 is a deficient number, since it is larger than the sum of its proper divisors (131719625).

320985775 is a wasteful number, since it uses less digits than its factorization.

320985775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720 (or 3704 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 320985775 is about 17916.0758817326. The cubic root of 320985775 is about 684.6920134980.

It can be divided in two parts, 32098 and 5775, that added together give a palindrome (37873).

The spelling of 320985775 in words is "three hundred twenty million, nine hundred eighty-five thousand, seven hundred seventy-five".