320404401 has 6 divisors (see below), whose sum is σ = 462806370. Its totient is φ = 213602928.

The previous prime is 320404379. The next prime is 320404411. The reversal of 320404401 is 104404023.

It can be written as a sum of positive squares in only one way, i.e., 253573776 + 66830625 = 15924^2 + 8175^2 .

It is not a de Polignac number, because 320404401 - 2⁵ = 320404369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320404411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17800236 + ... + 17800253.

It is an arithmetic number, because the mean of its divisors is an integer number (77134395).

Almost surely, 2^320404401 is an apocalyptic number.

It is an amenable number.

320404401 is a deficient number, since it is larger than the sum of its proper divisors (142401969).

320404401 is a wasteful number, since it uses less digits than its factorization.

320404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35600495 (or 35600492 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 320404401 is about 17899.8436026687. The cubic root of 320404401 is about 684.2783890396.

Adding to 320404401 its reverse (104404023), we get a palindrome (424808424).

The spelling of 320404401 in words is "three hundred twenty million, four hundred four thousand, four hundred one".