305728412 has 12 divisors (see below), whose sum is σ = 583663416. Its totient is φ = 138967440.

The previous prime is 305728363. The next prime is 305728427. The reversal of 305728412 is 214827503.

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, 3474143 + ... + 3474230.

It is an arithmetic number, because the mean of its divisors is an integer number (48638618).

Almost surely, 2^305728412 is an apocalyptic number.

It is an amenable number.

305728412 is a deficient number, since it is larger than the sum of its proper divisors (277935004).

305728412 is a wasteful number, since it uses less digits than its factorization.

305728412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948388 (or 6948386 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 305728412 is about 17485.0911350213. The cubic root of 305728412 is about 673.6669893817. Note that the first 3 decimals are identical.

Subtracting from 305728412 its reverse (214827503), we obtain a palindrome (90900909).

The spelling of 305728412 in words is "three hundred five million, seven hundred twenty-eight thousand, four hundred twelve".