28395730 has 16 divisors (see below), whose sum is σ = 55759104. Its totient is φ = 10325680.

The previous prime is 28395713. The next prime is 28395733. The reversal of 28395730 is 3759382.

It is a self number, because there is not a number n which added to its sum of digits gives 28395730.

It is not an unprimeable number, because it can be changed into a prime (28395733) 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 7 ways as a sum of consecutive naturals, for example, 128962 + ... + 129181.

It is an arithmetic number, because the mean of its divisors is an integer number (3484944).

Almost surely, 2^28395730 is an apocalyptic number.

28395730 is a deficient number, since it is larger than the sum of its proper divisors (27363374).

28395730 is a wasteful number, since it uses less digits than its factorization.

28395730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258161.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28395730 is about 5328.7643971187. The cubic root of 28395730 is about 305.0827689010.

The spelling of 28395730 in words is "twenty-eight million, three hundred ninety-five thousand, seven hundred thirty".