30381568 has 80 divisors (see below), whose sum is σ = 71200800. Its totient is φ = 12945408.

The previous prime is 30381557. The next prime is 30381577. The reversal of 30381568 is 86518303.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175530 + ... + 175702.

It is an arithmetic number, because the mean of its divisors is an integer number (890010).

Almost surely, 2^30381568 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 30381568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35600400).

30381568 is an abundant number, since it is smaller than the sum of its proper divisors (40819232).

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

30381568 is an frugal number, since it uses more digits than its factorization.

30381568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 30381568 is about 5511.9477501152. The cubic root of 30381568 is about 312.0350607104.

The spelling of 30381568 in words is "thirty million, three hundred eighty-one thousand, five hundred sixty-eight".