28189244 has 6 divisors (see below), whose sum is σ = 49331184. Its totient is φ = 14094620.

The previous prime is 28189243. The next prime is 28189277. The reversal of 28189244 is 44298182.

It is a junction number, because it is equal to n+sod(n) for n = 28189198 and 28189207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3523652 + ... + 3523659.

It is an arithmetic number, because the mean of its divisors is an integer number (8221864).

Almost surely, 2^28189244 is an apocalyptic number.

It is an amenable number.

28189244 is a deficient number, since it is larger than the sum of its proper divisors (21141940).

28189244 is a wasteful number, since it uses less digits than its factorization.

28189244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7047315 (or 7047313 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 28189244 is about 5309.3543863638. The cubic root of 28189244 is about 304.3414762792.

The spelling of 28189244 in words is "twenty-eight million, one hundred eighty-nine thousand, two hundred forty-four".