320001000 has 128 divisors (see below), whose sum is σ = 1089279360. Its totient is φ = 77568000.

The previous prime is 320000999. The next prime is 320001007. The reversal of 320001000 is 100023.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 320001000.

It is not an unprimeable number, because it can be changed into a prime (320001007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28152 + ... + 37848.

It is an arithmetic number, because the mean of its divisors is an integer number (8509995).

Almost surely, 2^320001000 is an apocalyptic number.

320001000 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 320001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544639680).

320001000 is an abundant number, since it is smaller than the sum of its proper divisors (769278360).

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

320001000 is a wasteful number, since it uses less digits than its factorization.

320001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9732 (or 9718 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 320001000 is about 17888.5717708262. The cubic root of 320001000 is about 683.9910911599.

Adding to 320001000 its reverse (100023), we get a palindrome (320101023).

The spelling of 320001000 in words is "three hundred twenty million, one thousand".