305680212 has 72 divisors (see below), whose sum is σ = 832366080. Its totient is φ = 94311360.

The previous prime is 305680157. The next prime is 305680217. The reversal of 305680212 is 212086503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305680217) 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 23 ways as a sum of consecutive naturals, for example, 19714 + ... + 31622.

It is an arithmetic number, because the mean of its divisors is an integer number (11560640).

Almost surely, 2^305680212 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 305680212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416183040).

305680212 is an abundant number, since it is smaller than the sum of its proper divisors (526685868).

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

305680212 is a wasteful number, since it uses less digits than its factorization.

305680212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973 (or 11968 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 305680212 is about 17483.7127635980. The cubic root of 305680212 is about 673.6315849136.

The spelling of 305680212 in words is "three hundred five million, six hundred eighty thousand, two hundred twelve".