28047903 has 8 divisors (see below), whose sum is σ = 40273968. Its totient is φ = 17260224.

The previous prime is 28047889. The next prime is 28047907. The reversal of 28047903 is 30974082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28047903 - 2⁵ = 28047871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359550 + ... + 359627.

It is an arithmetic number, because the mean of its divisors is an integer number (5034246).

Almost surely, 2^28047903 is an apocalyptic number.

28047903 is a deficient number, since it is larger than the sum of its proper divisors (12226065).

28047903 is a wasteful number, since it uses less digits than its factorization.

28047903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719193.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28047903 is about 5296.0270958521. The cubic root of 28047903 is about 303.8319672438.

The spelling of 28047903 in words is "twenty-eight million, forty-seven thousand, nine hundred three".