28189976 has 16 divisors (see below), whose sum is σ = 52914600. Its totient is φ = 14079424.

The previous prime is 28189963. The next prime is 28189979. The reversal of 28189976 is 67998182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189979) 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 3 ways as a sum of consecutive naturals, for example, 10235 + ... + 12693.

Almost surely, 2^28189976 is an apocalyptic number.

It is an amenable number.

28189976 is a deficient number, since it is larger than the sum of its proper divisors (24724624).

28189976 is a wasteful number, since it uses less digits than its factorization.

28189976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898 (or 3894 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 28189976 is about 5309.4233208513. The cubic root of 28189976 is about 304.3441105704.

The spelling of 28189976 in words is "twenty-eight million, one hundred eighty-nine thousand, nine hundred seventy-six".