305728434 has 24 divisors (see below), whose sum is σ = 722631312. Its totient is φ = 92644920.

The previous prime is 305728429. The next prime is 305728441. The reversal of 305728434 is 434827503.

It is a happy number.

305728434 is a `hidden beast` number, since 3 + 0 + 572 + 84 + 3 + 4 = 666.

305728434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 771844 + ... + 772239.

It is an arithmetic number, because the mean of its divisors is an integer number (30109638).

Almost surely, 2^305728434 is an apocalyptic number.

305728434 is an abundant number, since it is smaller than the sum of its proper divisors (416902878).

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

305728434 is a wasteful number, since it uses less digits than its factorization.

305728434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544102 (or 1544099 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 305728434 is about 17485.0917641287. The cubic root of 305728434 is about 673.6670055406.

The spelling of 305728434 in words is "three hundred five million, seven hundred twenty-eight thousand, four hundred thirty-four".