16288865 has 8 divisors (see below), whose sum is σ = 20220840. Its totient is φ = 12581632.

The previous prime is 16288859. The next prime is 16288901. The reversal of 16288865 is 56888261.

It can be written as a sum of positive squares in 4 ways, for example, as 4227136 + 12061729 = 2056^2 + 3473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16288865 - 2⁶ = 16288801 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56024 + ... + 56313.

It is an arithmetic number, because the mean of its divisors is an integer number (2527605).

Almost surely, 2^16288865 is an apocalyptic number.

It is an amenable number.

16288865 is a deficient number, since it is larger than the sum of its proper divisors (3931975).

16288865 is a wasteful number, since it uses less digits than its factorization.

16288865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112371.

The product of its digits is 184320, while the sum is 44.

The square root of 16288865 is about 4035.9466051969. The cubic root of 16288865 is about 253.4916206461.

The spelling of 16288865 in words is "sixteen million, two hundred eighty-eight thousand, eight hundred sixty-five".