320485281380 has 96 divisors (see below), whose sum is σ = 753374200320. Its totient is φ = 113506560000.

The previous prime is 320485281379. The next prime is 320485281407. The reversal of 320485281380 is 83182584023.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5391461 + ... + 5450579.

It is an arithmetic number, because the mean of its divisors is an integer number (7847647920).

Almost surely, 2^320485281380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320485281380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376687100160).

320485281380 is an abundant number, since it is smaller than the sum of its proper divisors (432888918940).

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

320485281380 is a wasteful number, since it uses less digits than its factorization.

320485281380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59781 (or 59779 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 320485281380 in words is "three hundred twenty billion, four hundred eighty-five million, two hundred eighty-one thousand, three hundred eighty".