28758873 has 32 divisors (see below), whose sum is σ = 46126080. Its totient is φ = 15704640.

The previous prime is 28758869. The next prime is 28758881. The reversal of 28758873 is 37885782.

It is not a de Polignac number, because 28758873 - 2² = 28758869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28758803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17668 + ... + 19226.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^28758873 is an apocalyptic number.

It is an amenable number.

28758873 is a deficient number, since it is larger than the sum of its proper divisors (17367207).

28758873 is a wasteful number, since it uses less digits than its factorization.

28758873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its digits is 752640, while the sum is 48.

The square root of 28758873 is about 5362.7299950678. The cubic root of 28758873 is about 306.3777960047.

It can be divided in two parts, 287588 and 73, that added together give a triangular number (287661 = T₇₅₈).

The spelling of 28758873 in words is "twenty-eight million, seven hundred fifty-eight thousand, eight hundred seventy-three".