30686672 has 20 divisors (see below), whose sum is σ = 62585280. Its totient is φ = 14535648.

The previous prime is 30686659. The next prime is 30686693. The reversal of 30686672 is 27668603.

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

It is a congruent number.

It is an unprimeable number.

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, 50168 + ... + 50775.

It is an arithmetic number, because the mean of its divisors is an integer number (3129264).

Almost surely, 2^30686672 is an apocalyptic number.

It is an amenable number.

30686672 is an abundant number, since it is smaller than the sum of its proper divisors (31898608).

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

30686672 is a wasteful number, since it uses less digits than its factorization.

30686672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100970 (or 100964 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 30686672 is about 5539.5552168022. Note that the first 3 decimals coincide. The cubic root of 30686672 is about 313.0761110148.

The spelling of 30686672 in words is "thirty million, six hundred eighty-six thousand, six hundred seventy-two".