28758717 has 24 divisors (see below), whose sum is σ = 46685184. Its totient is φ = 16926624.

The previous prime is 28758707. The next prime is 28758727. The reversal of 28758717 is 71785782.

It is an interprime number because it is at equal distance from previous prime (28758707) and next prime (28758727).

It is not a de Polignac number, because 28758717 - 2²⁰ = 27710141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2653 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (1945216).

Almost surely, 2^28758717 is an apocalyptic number.

It is an amenable number.

28758717 is a deficient number, since it is larger than the sum of its proper divisors (17926467).

28758717 is a wasteful number, since it uses less digits than its factorization.

28758717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729 (or 10726 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 28758717 is about 5362.7154502174. The cubic root of 28758717 is about 306.3772420305.

The spelling of 28758717 in words is "twenty-eight million, seven hundred fifty-eight thousand, seven hundred seventeen".