320445426 has 32 divisors (see below), whose sum is σ = 733224960. Its totient is φ = 91458576.

The previous prime is 320445421. The next prime is 320445439. The reversal of 320445426 is 624544023.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320445393 and 320445402.

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 15 ways as a sum of consecutive naturals, for example, 42145 + ... + 49163.

It is an arithmetic number, because the mean of its divisors is an integer number (22913280).

Almost surely, 2^320445426 is an apocalyptic number.

320445426 is an abundant number, since it is smaller than the sum of its proper divisors (412779534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320445426 is a wasteful number, since it uses less digits than its factorization.

320445426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 320445426 is about 17900.9895257218. The cubic root of 320445426 is about 684.3075930942.

Adding to 320445426 its reverse (624544023), we get a palindrome (944989449).

The spelling of 320445426 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred twenty-six".