16288889 has 4 divisors (see below), whose sum is σ = 16407924. Its totient is φ = 16169856.

The previous prime is 16288859. The next prime is 16288901. The reversal of 16288889 is 98888261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98888261 = 43 ⋅2299727.

It can be written as a sum of positive squares in 2 ways, for example, as 3579664 + 12709225 = 1892^2 + 3565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16288889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16288819) 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 3 ways as a sum of consecutive naturals, for example, 59312 + ... + 59585.

It is an arithmetic number, because the mean of its divisors is an integer number (4101981).

Almost surely, 2^16288889 is an apocalyptic number.

It is an amenable number.

16288889 is a deficient number, since it is larger than the sum of its proper divisors (119035).

16288889 is a wasteful number, since it uses less digits than its factorization.

16288889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119034.

The product of its digits is 442368, while the sum is 50.

The square root of 16288889 is about 4035.9495784759. The cubic root of 16288889 is about 253.4917451442.

The spelling of 16288889 in words is "sixteen million, two hundred eighty-eight thousand, eight hundred eighty-nine".