30805983 has 24 divisors (see below), whose sum is σ = 48157200. Its totient is φ = 18864000.

The previous prime is 30805981. The next prime is 30805987. The reversal of 30805983 is 38950803.

It is not a de Polignac number, because 30805983 - 2¹ = 30805981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30805981) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28843 + ... + 29891.

It is an arithmetic number, because the mean of its divisors is an integer number (2006550).

Almost surely, 2^30805983 is an apocalyptic number.

30805983 is a deficient number, since it is larger than the sum of its proper divisors (17351217).

30805983 is a wasteful number, since it uses less digits than its factorization.

30805983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 30805983 is about 5550.3137749140. The cubic root of 30805983 is about 313.4813370757.

The spelling of 30805983 in words is "thirty million, eight hundred five thousand, nine hundred eighty-three".