320128676 has 48 divisors (see below), whose sum is σ = 653291520. Its totient is φ = 134434080.

The previous prime is 320128673. The next prime is 320128681. The reversal of 320128676 is 676821023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320128673) 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, 322541 + ... + 323531.

It is an arithmetic number, because the mean of its divisors is an integer number (13610240).

Almost surely, 2^320128676 is an apocalyptic number.

It is an amenable number.

320128676 is an abundant number, since it is smaller than the sum of its proper divisors (333162844).

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

320128676 is a wasteful number, since it uses less digits than its factorization.

320128676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 320128676 is about 17892.1400620496. The cubic root of 320128676 is about 684.0820467452.

Adding to 320128676 its reverse (676821023), we get a palindrome (996949699).

The spelling of 320128676 in words is "three hundred twenty million, one hundred twenty-eight thousand, six hundred seventy-six".