320440023 has 16 divisors (see below), whose sum is σ = 477193440. Its totient is φ = 212516352.

The previous prime is 320440019. The next prime is 320440039. The reversal of 320440023 is 320044023.

It is not a de Polignac number, because 320440023 - 2² = 320440019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320439978 and 320440005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320440093) 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, 25536 + ... + 35957.

It is an arithmetic number, because the mean of its divisors is an integer number (29824590).

Almost surely, 2^320440023 is an apocalyptic number.

320440023 is a deficient number, since it is larger than the sum of its proper divisors (156753417).

320440023 is a wasteful number, since it uses less digits than its factorization.

320440023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61695 (or 61689 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 320440023 is about 17900.8386116405. The cubic root of 320440023 is about 684.3037470573.

Adding to 320440023 its reverse (320044023), we get a palindrome (640484046).

The spelling of 320440023 in words is "three hundred twenty million, four hundred forty thousand, twenty-three".