320395872 has 96 divisors (see below), whose sum is σ = 897638112. Its totient is φ = 99713024.

The previous prime is 320395849. The next prime is 320395891. The reversal of 320395872 is 278593023.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 320395872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222868 + ... + 224300.

It is an arithmetic number, because the mean of its divisors is an integer number (9350397).

Almost surely, 2^320395872 is an apocalyptic number.

320395872 is a gapful number since it is divisible by the number (32) 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 320395872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448819056).

320395872 is an abundant number, since it is smaller than the sum of its proper divisors (577242240).

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

320395872 is a wasteful number, since it uses less digits than its factorization.

320395872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 320395872 is about 17899.6053587782. The cubic root of 320395872 is about 684.2723172730.

The spelling of 320395872 in words is "three hundred twenty million, three hundred ninety-five thousand, eight hundred seventy-two".