28717065 has 32 divisors (see below), whose sum is σ = 54983040. Its totient is φ = 14136768.

The previous prime is 28717021. The next prime is 28717079. The reversal of 28717065 is 56071782.

28717065 = 404² + 405² + ... + 533².

It is not a de Polignac number, because 28717065 - 2⁶ = 28717001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6427 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (1718220).

Almost surely, 2^28717065 is an apocalyptic number.

It is an amenable number.

28717065 is a deficient number, since it is larger than the sum of its proper divisors (26265975).

28717065 is a wasteful number, since it uses less digits than its factorization.

28717065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390 (or 16384 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28717065 is about 5358.8305627254. The cubic root of 28717065 is about 306.2292591812.

The spelling of 28717065 in words is "twenty-eight million, seven hundred seventeen thousand, sixty-five".