320989020 has 96 divisors (see below), whose sum is σ = 986259456. Its totient is φ = 77356800.

The previous prime is 320989007. The next prime is 320989033. The reversal of 320989020 is 20989023.

It is an interprime number because it is at equal distance from previous prime (320989007) and next prime (320989033).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118117 + ... + 120803.

It is an arithmetic number, because the mean of its divisors is an integer number (10273536).

Almost surely, 2^320989020 is an apocalyptic number.

320989020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320989020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493129728).

320989020 is an abundant number, since it is smaller than the sum of its proper divisors (665270436).

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

320989020 is a wasteful number, since it uses less digits than its factorization.

320989020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 320989020 is about 17916.1664426294. The cubic root of 320989020 is about 684.6943207841.

It can be divided in two parts, 3209 and 89020, that added together give a palindrome (92229).

The spelling of 320989020 in words is "three hundred twenty million, nine hundred eighty-nine thousand, twenty".