30681616 has 20 divisors (see below), whose sum is σ = 67938112. Its totient is φ = 13149216.

The previous prime is 30681611. The next prime is 30681619. The reversal of 30681616 is 61618603.

It is not an unprimeable number, because it can be changed into a prime (30681611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136860 + ... + 137083.

Almost surely, 2^30681616 is an apocalyptic number.

It is an amenable number.

30681616 is an abundant number, since it is smaller than the sum of its proper divisors (37256496).

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

30681616 is a wasteful number, since it uses less digits than its factorization.

30681616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273958 (or 273952 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 30681616 is about 5539.0988436748. The cubic root of 30681616 is about 313.0589157130.

The spelling of 30681616 in words is "thirty million, six hundred eighty-one thousand, six hundred sixteen".