30681168 has 80 divisors (see below), whose sum is σ = 91422720. Its totient is φ = 8684928.

The previous prime is 30681163. The next prime is 30681173. The reversal of 30681168 is 86118603.

It is an interprime number because it is at equal distance from previous prime (30681163) and next prime (30681173).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30681163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42313 + ... + 43031.

It is an arithmetic number, because the mean of its divisors is an integer number (1142784).

Almost surely, 2^30681168 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 30681168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45711360).

30681168 is an abundant number, since it is smaller than the sum of its proper divisors (60741552).

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

30681168 is a wasteful number, since it uses less digits than its factorization.

30681168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 30681168 is about 5539.0584037361. The cubic root of 30681168 is about 313.0573919876.

The spelling of 30681168 in words is "thirty million, six hundred eighty-one thousand, one hundred sixty-eight".