305286312 has 32 divisors (see below), whose sum is σ = 766562400. Its totient is φ = 101315904.

The previous prime is 305286271. The next prime is 305286313. The reversal of 305286312 is 213682503.

It is a super-2 number, since 2×305286312² = 186399464589122688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 305286312.

It is not an unprimeable number, because it can be changed into a prime (305286313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22278 + ... + 33269.

It is an arithmetic number, because the mean of its divisors is an integer number (23955075).

Almost surely, 2^305286312 is an apocalyptic number.

It is an amenable number.

305286312 is an abundant number, since it is smaller than the sum of its proper divisors (461276088).

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

305286312 is a wasteful number, since it uses less digits than its factorization.

305286312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55785 (or 55781 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 305286312 is about 17472.4443624812. Note that the first 3 decimals coincide. The cubic root of 305286312 is about 673.3421129681.

The spelling of 305286312 in words is "three hundred five million, two hundred eighty-six thousand, three hundred twelve".