30668660 has 144 divisors (see below), whose sum is σ = 80438400. Its totient is φ = 9757440.

The previous prime is 30668633. The next prime is 30668681. The reversal of 30668660 is 6686603.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30668660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057526 + ... + 1057554.

It is an arithmetic number, because the mean of its divisors is an integer number (558600).

Almost surely, 2^30668660 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 30668660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40219200).

30668660 is an abundant number, since it is smaller than the sum of its proper divisors (49769740).

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

30668660 is a wasteful number, since it uses less digits than its factorization.

30668660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 30668660 is about 5537.9292158712. The cubic root of 30668660 is about 313.0148441279.

The spelling of 30668660 in words is "thirty million, six hundred sixty-eight thousand, six hundred sixty".