320445401 has 4 divisors (see below), whose sum is σ = 320481204. Its totient is φ = 320409600.

The previous prime is 320445347. The next prime is 320445421. The reversal of 320445401 is 104544023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 45549001 + 274896400 = 6749^2 + 16580^2 .

It is a cyclic number.

It is not a de Polignac number, because 320445401 - 2¹⁴ = 320429017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320445421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8921 + ... + 26841.

It is an arithmetic number, because the mean of its divisors is an integer number (80120301).

Almost surely, 2^320445401 is an apocalyptic number.

It is an amenable number.

320445401 is a deficient number, since it is larger than the sum of its proper divisors (35803).

320445401 is a wasteful number, since it uses less digits than its factorization.

320445401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35802.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 320445401 is about 17900.9888274363. The cubic root of 320445401 is about 684.3075752984.

Adding to 320445401 its reverse (104544023), we get a palindrome (424989424).

The spelling of 320445401 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred one".