305123012 has 12 divisors (see below), whose sum is σ = 546383376. Its totient is φ = 149013480.

The previous prime is 305123011. The next prime is 305123029. The reversal of 305123012 is 210321503.

It is not an unprimeable number, because it can be changed into a prime (305123011) 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, 886814 + ... + 887157.

It is an arithmetic number, because the mean of its divisors is an integer number (45531948).

Almost surely, 2^305123012 is an apocalyptic number.

It is an amenable number.

305123012 is a deficient number, since it is larger than the sum of its proper divisors (241260364).

305123012 is a wasteful number, since it uses less digits than its factorization.

305123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774018 (or 1774016 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 305123012 is about 17467.7706648559. The cubic root of 305123012 is about 673.2220329273. Note that the first 3 decimals are identical.

Adding to 305123012 its reverse (210321503), we get a palindrome (515444515).

The spelling of 305123012 in words is "three hundred five million, one hundred twenty-three thousand, twelve".