320443020030 has 128 divisors (see below), whose sum is σ = 897693696000. Its totient is φ = 73176590592.

The previous prime is 320443020013. The next prime is 320443020041. The reversal of 320443020030 is 30020344023.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 320443019979 and 320443020006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11603619 + ... + 11631201.

It is an arithmetic number, because the mean of its divisors is an integer number (7013232000).

Almost surely, 2^320443020030 is an apocalyptic number.

320443020030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 320443020030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448846848000).

320443020030 is an abundant number, since it is smaller than the sum of its proper divisors (577250675970).

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

320443020030 is a wasteful number, since it uses less digits than its factorization.

320443020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28743 (or 28729 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 320443020030 its reverse (30020344023), we get a palindrome (350463364053).

The spelling of 320443020030 in words is "three hundred twenty billion, four hundred forty-three million, twenty thousand, thirty".