30685172 has 36 divisors (see below), whose sum is σ = 63814464. Its totient is φ = 12867120.

The previous prime is 30685121. The next prime is 30685199. The reversal of 30685172 is 27158603.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7547 + ... + 10877.

It is an arithmetic number, because the mean of its divisors is an integer number (1772624).

Almost surely, 2^30685172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30685172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31907232).

30685172 is an abundant number, since it is smaller than the sum of its proper divisors (33129292).

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

30685172 is a wasteful number, since it uses less digits than its factorization.

30685172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396 (or 3387 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 30685172 is about 5539.4198252164. The cubic root of 30685172 is about 313.0710097577.

The spelling of 30685172 in words is "thirty million, six hundred eighty-five thousand, one hundred seventy-two".