28914717 has 32 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 17197440.

The previous prime is 28914709. The next prime is 28914719. The reversal of 28914717 is 71741982.

It is not a de Polignac number, because 28914717 - 2³ = 28914709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28914719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270178 + ... + 270284.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 2^28914717 is an apocalyptic number.

It is an amenable number.

28914717 is a deficient number, since it is larger than the sum of its proper divisors (14268003).

28914717 is a wasteful number, since it uses less digits than its factorization.

28914717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 164 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 28914717 is about 5377.2406492550. The cubic root of 28914717 is about 306.9302185897.

The spelling of 28914717 in words is "twenty-eight million, nine hundred fourteen thousand, seven hundred seventeen".