30317628 has 72 divisors (see below), whose sum is σ = 80075520. Its totient is φ = 8853600.

The previous prime is 30317627. The next prime is 30317653. The reversal of 30317628 is 82671303.

It is a junction number, because it is equal to n+sod(n) for n = 30317595 and 30317604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30317627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126733 + ... + 126971.

It is an arithmetic number, because the mean of its divisors is an integer number (1112160).

Almost surely, 2^30317628 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 30317628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40037760).

30317628 is an abundant number, since it is smaller than the sum of its proper divisors (49757892).

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

30317628 is a wasteful number, since it uses less digits than its factorization.

30317628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 286 counting only the distinct ones).

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

The square root of 30317628 is about 5506.1445676626. The cubic root of 30317628 is about 311.8160075595.

The spelling of 30317628 in words is "thirty million, three hundred seventeen thousand, six hundred twenty-eight".