305878728 has 16 divisors (see below), whose sum is σ = 764696880. Its totient is φ = 101959568.

The previous prime is 305878723. The next prime is 305878787. The reversal of 305878728 is 827878503.

It is not an unprimeable number, because it can be changed into a prime (305878723) 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, 6372450 + ... + 6372497.

It is an arithmetic number, because the mean of its divisors is an integer number (47793555).

Almost surely, 2^305878728 is an apocalyptic number.

It is an amenable number.

305878728 is an abundant number, since it is smaller than the sum of its proper divisors (458818152).

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

305878728 is a wasteful number, since it uses less digits than its factorization.

305878728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744956 (or 12744952 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The square root of 305878728 is about 17489.3890116264. The cubic root of 305878728 is about 673.7773774821. Note that the first 3 decimals are identical.

The spelling of 305878728 in words is "three hundred five million, eight hundred seventy-eight thousand, seven hundred twenty-eight".