28575930 has 32 divisors (see below), whose sum is σ = 69268608. Its totient is φ = 7544000.

The previous prime is 28575919. The next prime is 28575931. The reversal of 28575930 is 3957582.

It is not an unprimeable number, because it can be changed into a prime (28575931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686 + ... + 7745.

It is an arithmetic number, because the mean of its divisors is an integer number (2164644).

Almost surely, 2^28575930 is an apocalyptic number.

28575930 is an abundant number, since it is smaller than the sum of its proper divisors (40692678).

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

28575930 is a wasteful number, since it uses less digits than its factorization.

28575930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9542.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 28575930 is about 5345.6458917515. The cubic root of 28575930 is about 305.7267627972.

The spelling of 28575930 in words is "twenty-eight million, five hundred seventy-five thousand, nine hundred thirty".