28189294 has 16 divisors (see below), whose sum is σ = 48416256. Its totient is φ = 12058200.

The previous prime is 28189279. The next prime is 28189307. The reversal of 28189294 is 49298182.

It is a self number, because there is not a number n which added to its sum of digits gives 28189294.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7239 + ... + 10429.

It is an arithmetic number, because the mean of its divisors is an integer number (3026016).

Almost surely, 2^28189294 is an apocalyptic number.

28189294 is a deficient number, since it is larger than the sum of its proper divisors (20226962).

28189294 is a wasteful number, since it uses less digits than its factorization.

28189294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831.

The product of its digits is 82944, while the sum is 43.

The square root of 28189294 is about 5309.3590950321. The cubic root of 28189294 is about 304.3416562186.

The spelling of 28189294 in words is "twenty-eight million, one hundred eighty-nine thousand, two hundred ninety-four".