30352728 has 128 divisors (see below), whose sum is σ = 94118400. Its totient is φ = 7962624.

The previous prime is 30352723. The next prime is 30352733. The reversal of 30352728 is 82725303.

It is an interprime number because it is at equal distance from previous prime (30352723) and next prime (30352733).

It is a junction number, because it is equal to n+sod(n) for n = 30352695 and 30352704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30352723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117976 + ... + 118232.

It is an arithmetic number, because the mean of its divisors is an integer number (735300).

Almost surely, 2^30352728 is an apocalyptic number.

30352728 is a gapful number since it is divisible by the number (38) 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 30352728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47059200).

30352728 is an abundant number, since it is smaller than the sum of its proper divisors (63765672).

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

30352728 is a wasteful number, since it uses less digits than its factorization.

30352728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 30352728 is about 5509.3309938685. The cubic root of 30352728 is about 311.9362953433.

The spelling of 30352728 in words is "thirty million, three hundred fifty-two thousand, seven hundred twenty-eight".