30993616 has 20 divisors (see below), whose sum is σ = 60361092. Its totient is φ = 15416576.

The previous prime is 30993607. The next prime is 30993619. The reversal of 30993616 is 61639903.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 5953600 = 5004^2 + 2440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30993619) 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 3 ways as a sum of consecutive naturals, for example, 1765 + ... + 8068.

Almost surely, 2^30993616 is an apocalyptic number.

It is an amenable number.

30993616 is a deficient number, since it is larger than the sum of its proper divisors (29367476).

30993616 is a wasteful number, since it uses less digits than its factorization.

30993616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038 (or 10032 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 30993616 is about 5567.1910331872. The cubic root of 30993616 is about 314.1164997005.

The spelling of 30993616 in words is "thirty million, nine hundred ninety-three thousand, six hundred sixteen".