328105728 has 90 divisors (see below), whose sum is σ = 978413744. Its totient is φ = 109361664.

The previous prime is 328105663. The next prime is 328105801. The reversal of 328105728 is 827501823.

328105728 is a `hidden beast` number, since 3 + 2 + 81 + 0 + 572 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 328105692 and 328105701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12825 + ... + 28647.

Almost surely, 2^328105728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328105728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489206872).

328105728 is an abundant number, since it is smaller than the sum of its proper divisors (650308016).

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

328105728 is an equidigital number, since it uses as much as digits as its factorization.

328105728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15851 (or 15828 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 328105728 is about 18113.6889671872. The cubic root of 328105728 is about 689.7175403422.

The spelling of 328105728 in words is "three hundred twenty-eight million, one hundred five thousand, seven hundred twenty-eight".