30666312 has 48 divisors (see below), whose sum is σ = 84474000. Its totient is φ = 10047456.

The previous prime is 30666257. The next prime is 30666313. The reversal of 30666312 is 21366603.

It is not an unprimeable number, because it can be changed into a prime (30666313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639 + ... + 7857.

It is an arithmetic number, because the mean of its divisors is an integer number (1759875).

Almost surely, 2^30666312 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 30666312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42237000).

30666312 is an abundant number, since it is smaller than the sum of its proper divisors (53807688).

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

30666312 is a wasteful number, since it uses less digits than its factorization.

30666312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290 (or 7283 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 30666312 is about 5537.7172192159. The cubic root of 30666312 is about 313.0068557600.

The spelling of 30666312 in words is "thirty million, six hundred sixty-six thousand, three hundred twelve".