30091328 has 56 divisors (see below), whose sum is σ = 63886080. Its totient is φ = 14031360.

The previous prime is 30091301. The next prime is 30091331. The reversal of 30091328 is 82319003.

It is a junction number, because it is equal to n+sod(n) for n = 30091297 and 30091306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57275 + ... + 57797.

Almost surely, 2^30091328 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 30091328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31943040).

30091328 is an abundant number, since it is smaller than the sum of its proper divisors (33794752).

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

30091328 is a wasteful number, since it uses less digits than its factorization.

30091328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 30091328 is about 5485.5563072491. The cubic root of 30091328 is about 311.0382393195.

The spelling of 30091328 in words is "thirty million, ninety-one thousand, three hundred twenty-eight".