28717129 has 16 divisors (see below), whose sum is σ = 34467840. Its totient is φ = 23406480.

The previous prime is 28717127. The next prime is 28717159. The reversal of 28717129 is 92171782.

It is not a de Polignac number, because 28717129 - 2¹ = 28717127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28717123) 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 15 ways as a sum of consecutive naturals, for example, 11682 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (2154240).

Almost surely, 2^28717129 is an apocalyptic number.

It is an amenable number.

28717129 is a deficient number, since it is larger than the sum of its proper divisors (5750711).

28717129 is a wasteful number, since it uses less digits than its factorization.

28717129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

The product of its digits is 14112, while the sum is 37.

The square root of 28717129 is about 5358.8365341742. The cubic root of 28717129 is about 306.2294866726.

It can be divided in two parts, 2871 and 7129, that added together give a 4-th power (10000 = 10⁴).

The spelling of 28717129 in words is "twenty-eight million, seven hundred seventeen thousand, one hundred twenty-nine".