320028880 has 20 divisors (see below), whose sum is σ = 744067332. Its totient is φ = 128011520.

The previous prime is 320028871. The next prime is 320028883. The reversal of 320028880 is 88820023.

It can be written as a sum of positive squares in 2 ways, for example, as 253573776 + 66455104 = 15924^2 + 8152^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320028883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000101 + ... + 2000260.

Almost surely, 2^320028880 is an apocalyptic number.

It is an amenable number.

320028880 is an abundant number, since it is smaller than the sum of its proper divisors (424038452).

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

320028880 is a wasteful number, since it uses less digits than its factorization.

320028880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000374 (or 4000368 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 320028880 is about 17889.3510223261. The cubic root of 320028880 is about 684.0109547623.

The spelling of 320028880 in words is "three hundred twenty million, twenty-eight thousand, eight hundred eighty".