28706873 has 8 divisors (see below), whose sum is σ = 31033800. Its totient is φ = 26396928.

The previous prime is 28706833. The next prime is 28706879. The reversal of 28706873 is 37860782.

It can be written as a sum of positive squares in 4 ways, for example, as 2930944 + 25775929 = 1712^2 + 5077^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28706873 - 2⁶ = 28706809 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 28706873.

It is not an unprimeable number, because it can be changed into a prime (28706879) 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 7 ways as a sum of consecutive naturals, for example, 608 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (3879225).

Almost surely, 2^28706873 is an apocalyptic number.

It is an amenable number.

28706873 is a deficient number, since it is larger than the sum of its proper divisors (2326927).

28706873 is a wasteful number, since it uses less digits than its factorization.

28706873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28706873 is about 5357.8795245881. The cubic root of 28706873 is about 306.1930268583.

The spelling of 28706873 in words is "twenty-eight million, seven hundred six thousand, eight hundred seventy-three".