320728223260 has 24 divisors (see below), whose sum is σ = 673542608256. Its totient is φ = 128288748480.

The previous prime is 320728223251. The next prime is 320728223267. The reversal of 320728223260 is 62322827023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320728223267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132309 + ... + 1386931.

It is an arithmetic number, because the mean of its divisors is an integer number (28064275344).

Almost surely, 2^320728223260 is an apocalyptic number.

It is an amenable number.

320728223260 is an abundant number, since it is smaller than the sum of its proper divisors (352814384996).

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

320728223260 is a wasteful number, since it uses less digits than its factorization.

320728223260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317613 (or 317611 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 320728223260 in words is "three hundred twenty billion, seven hundred twenty-eight million, two hundred twenty-three thousand, two hundred sixty".