320421260 has 12 divisors (see below), whose sum is σ = 672884688. Its totient is φ = 128168496.

The previous prime is 320421259. The next prime is 320421307. The reversal of 320421260 is 62124023.

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: 16021063 = 320421260 / (3 + 2 + 0 + 4 + 2 + 1 + 2 + 6 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8010512 + ... + 8010551.

It is an arithmetic number, because the mean of its divisors is an integer number (56073724).

Almost surely, 2^320421260 is an apocalyptic number.

It is an amenable number.

320421260 is an abundant number, since it is smaller than the sum of its proper divisors (352463428).

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

320421260 is a wasteful number, since it uses less digits than its factorization.

320421260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16021072 (or 16021070 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 320421260 is about 17900.3145223764. The cubic root of 320421260 is about 684.2903905882.

Adding to 320421260 its reverse (62124023), we get a palindrome (382545283).

The spelling of 320421260 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred sixty".