320045420 has 12 divisors (see below), whose sum is σ = 672095424. Its totient is φ = 128018160.

The previous prime is 320045371. The next prime is 320045423. The reversal of 320045420 is 24540023.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 16002271 = 320045420 / (3 + 2 + 0 + 0 + 4 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 320045392 and 320045401.

It is not an unprimeable number, because it can be changed into a prime (320045423) 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, 8001116 + ... + 8001155.

It is an arithmetic number, because the mean of its divisors is an integer number (56007952).

Almost surely, 2^320045420 is an apocalyptic number.

It is an amenable number.

320045420 is an abundant number, since it is smaller than the sum of its proper divisors (352050004).

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

320045420 is a wasteful number, since it uses less digits than its factorization.

320045420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16002280 (or 16002278 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 320045420 is about 17889.8133025473. The cubic root of 320045420 is about 684.0227384345.

Adding to 320045420 its reverse (24540023), we get a palindrome (344585443).

The spelling of 320045420 in words is "three hundred twenty million, forty-five thousand, four hundred twenty".