30972208 has 10 divisors (see below), whose sum is σ = 60008684. Its totient is φ = 15486096.

The previous prime is 30972173. The next prime is 30972209. The reversal of 30972208 is 80227903.

It is a self number, because there is not a number n which added to its sum of digits gives 30972208.

It is not an unprimeable number, because it can be changed into a prime (30972209) by changing a digit.

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 as a sum of consecutive naturals, namely, 967866 + ... + 967897.

Almost surely, 2^30972208 is an apocalyptic number.

It is an amenable number.

30972208 is a deficient number, since it is larger than the sum of its proper divisors (29036476).

30972208 is a wasteful number, since it uses less digits than its factorization.

30972208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935771 (or 1935765 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 30972208 is about 5565.2680079220. The cubic root of 30972208 is about 314.0441605571.

The spelling of 30972208 in words is "thirty million, nine hundred seventy-two thousand, two hundred eight".