30788930 has 32 divisors (see below), whose sum is σ = 58829760. Its totient is φ = 11568960.

The previous prime is 30788897. The next prime is 30788939. The reversal of 30788930 is 3988703.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30788939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24272 + ... + 25508.

It is an arithmetic number, because the mean of its divisors is an integer number (1838430).

Almost surely, 2^30788930 is an apocalyptic number.

30788930 is a deficient number, since it is larger than the sum of its proper divisors (28040830).

30788930 is a wasteful number, since it uses less digits than its factorization.

30788930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 30788930 is about 5548.7773428026. Note that the first 3 decimals coincide. The cubic root of 30788930 is about 313.4234826869.

The spelling of 30788930 in words is "thirty million, seven hundred eighty-eight thousand, nine hundred thirty".