28845047 has 16 divisors (see below), whose sum is σ = 36321792. Its totient is φ = 22252320.

The previous prime is 28845031. The next prime is 28845071. The reversal of 28845047 is 74054882.

It is a cyclic number.

It is not a de Polignac number, because 28845047 - 2⁴ = 28845031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28845047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28845007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6113 + ... + 9749.

It is an arithmetic number, because the mean of its divisors is an integer number (2270112).

Almost surely, 2^28845047 is an apocalyptic number.

28845047 is a deficient number, since it is larger than the sum of its proper divisors (7476745).

28845047 is a wasteful number, since it uses less digits than its factorization.

28845047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28845047 is about 5370.7585125381. The cubic root of 28845047 is about 306.6835042477.

The spelling of 28845047 in words is "twenty-eight million, eight hundred forty-five thousand, forty-seven".