30728316 has 96 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 9031680.

The previous prime is 30728293. The next prime is 30728381. The reversal of 30728316 is 61382703.

It is a congruent number.

It is an unprimeable number.

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, 271876 + ... + 271988.

It is an arithmetic number, because the mean of its divisors is an integer number (842688).

Almost surely, 2^30728316 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 30728316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024).

30728316 is an abundant number, since it is smaller than the sum of its proper divisors (50169732).

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

30728316 is a wasteful number, since it uses less digits than its factorization.

30728316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30728316 is about 5543.3127279633. The cubic root of 30728316 is about 313.2176691946.

The spelling of 30728316 in words is "thirty million, seven hundred twenty-eight thousand, three hundred sixteen".