305728938 has 16 divisors (see below), whose sum is σ = 679397760. Its totient is φ = 101909628.

The previous prime is 305728879. The next prime is 305728939. The reversal of 305728938 is 839827503.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 305728893 and 305728902.

It is not an unprimeable number, because it can be changed into a prime (305728939) 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 7 ways as a sum of consecutive naturals, for example, 2830770 + ... + 2830877.

It is an arithmetic number, because the mean of its divisors is an integer number (42462360).

Almost surely, 2^305728938 is an apocalyptic number.

305728938 is an abundant number, since it is smaller than the sum of its proper divisors (373668822).

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

305728938 is a wasteful number, since it uses less digits than its factorization.

305728938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5661658 (or 5661652 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 305728938 is about 17485.1061764005. The cubic root of 305728938 is about 673.6673757253.

The spelling of 305728938 in words is "three hundred five million, seven hundred twenty-eight thousand, nine hundred thirty-eight".