30947380 has 48 divisors (see below), whose sum is σ = 66777984. Its totient is φ = 12044160.

The previous prime is 30947363. The next prime is 30947407. The reversal of 30947380 is 8374903.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 170890 + ... + 171070.

It is an arithmetic number, because the mean of its divisors is an integer number (1391208).

Almost surely, 2^30947380 is an apocalyptic number.

It is an amenable number.

30947380 is an abundant number, since it is smaller than the sum of its proper divisors (35830604).

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

30947380 is a wasteful number, since it uses less digits than its factorization.

30947380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 30947380 is about 5563.0369403771. The cubic root of 30947380 is about 313.9602232330.

The spelling of 30947380 in words is "thirty million, nine hundred forty-seven thousand, three hundred eighty".