28702173 has 16 divisors (see below), whose sum is σ = 39412800. Its totient is φ = 18568320.

The previous prime is 28702169. The next prime is 28702189. The reversal of 28702173 is 37120782.

It is not a de Polignac number, because 28702173 - 2² = 28702169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28702173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28702133) 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, 27658 + ... + 28676.

It is an arithmetic number, because the mean of its divisors is an integer number (2463300).

Almost surely, 2^28702173 is an apocalyptic number.

It is an amenable number.

28702173 is a deficient number, since it is larger than the sum of its proper divisors (10710627).

28702173 is a wasteful number, since it uses less digits than its factorization.

28702173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28702173 is about 5357.4409002807. The cubic root of 28702173 is about 306.1763155784.

The spelling of 28702173 in words is "twenty-eight million, seven hundred two thousand, one hundred seventy-three".