28189342 has 4 divisors (see below), whose sum is σ = 42284016. Its totient is φ = 14094670.

The previous prime is 28189309. The next prime is 28189393. The reversal of 28189342 is 24398182.

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

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 as a sum of consecutive naturals, namely, 7047334 + ... + 7047337.

It is an arithmetic number, because the mean of its divisors is an integer number (10571004).

Almost surely, 2^28189342 is an apocalyptic number.

28189342 is a deficient number, since it is larger than the sum of its proper divisors (14094674).

28189342 is a wasteful number, since it uses less digits than its factorization.

28189342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094673.

The product of its digits is 27648, while the sum is 37.

The square root of 28189342 is about 5309.3636153498. The cubic root of 28189342 is about 304.3418289602.

The spelling of 28189342 in words is "twenty-eight million, one hundred eighty-nine thousand, three hundred forty-two".