320286342920 has 16 divisors (see below), whose sum is σ = 720644271660. Its totient is φ = 128114537152.

The previous prime is 320286342913. The next prime is 320286342923. The reversal of 320286342920 is 29243682023.

It can be written as a sum of positive squares in 2 ways, for example, as 273836610436 + 46449732484 = 523294^2 + 215522^2 .

It is a super-2 number, since 2×320286342920² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320286342923) 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, 4003579247 + ... + 4003579326.

Almost surely, 2^320286342920 is an apocalyptic number.

It is an amenable number.

320286342920 is an abundant number, since it is smaller than the sum of its proper divisors (400357928740).

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

320286342920 is a wasteful number, since it uses less digits than its factorization.

320286342920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007158584 (or 8007158580 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 320286342920 in words is "three hundred twenty billion, two hundred eighty-six million, three hundred forty-two thousand, nine hundred twenty".