28189762 has 4 divisors (see below), whose sum is σ = 42284646. Its totient is φ = 14094880.

The previous prime is 28189751. The next prime is 28189793. The reversal of 28189762 is 26798182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 10118761 = 4251^2 + 3181^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7047439 + ... + 7047442.

Almost surely, 2^28189762 is an apocalyptic number.

28189762 is a deficient number, since it is larger than the sum of its proper divisors (14094884).

28189762 is a wasteful number, since it uses less digits than its factorization.

28189762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14094883.

The product of its digits is 96768, while the sum is 43.

The square root of 28189762 is about 5309.4031679653. The cubic root of 28189762 is about 304.3433404408.

The spelling of 28189762 in words is "twenty-eight million, one hundred eighty-nine thousand, seven hundred sixty-two".