30668140 has 12 divisors (see below), whose sum is σ = 64403136. Its totient is φ = 12267248.

The previous prime is 30668137. The next prime is 30668161. The reversal of 30668140 is 4186603.

It is a super-3 number, since 3×30668140³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 30668099 and 30668108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766684 + ... + 766723.

It is an arithmetic number, because the mean of its divisors is an integer number (5366928).

Almost surely, 2^30668140 is an apocalyptic number.

It is an amenable number.

30668140 is an abundant number, since it is smaller than the sum of its proper divisors (33734996).

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

30668140 is a wasteful number, since it uses less digits than its factorization.

30668140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533416 (or 1533414 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 30668140 is about 5537.8822667153. The cubic root of 30668140 is about 313.0130750185.

The spelling of 30668140 in words is "thirty million, six hundred sixty-eight thousand, one hundred forty".