16535889 has 12 divisors (see below), whose sum is σ = 23928372. Its totient is φ = 11004000.

The previous prime is 16535879. The next prime is 16535891. The reversal of 16535889 is 98853561.

16535889 is a `hidden beast` number, since 1 + 65 + 3 + 588 + 9 = 666.

16535889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13950225 + 2585664 = 3735^2 + 1608^2 .

It is not a de Polignac number, because 16535889 - 2¹³ = 16527697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16535879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4999 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (1994031).

Almost surely, 2^16535889 is an apocalyptic number.

It is an amenable number.

16535889 is a deficient number, since it is larger than the sum of its proper divisors (7392483).

16535889 is a wasteful number, since it uses less digits than its factorization.

16535889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328 (or 3325 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 16535889 is about 4066.4344332597. The cubic root of 16535889 is about 254.7666146053.

It can be divided in two parts, 16535 and 889, that added together give a square (17424 = 132²).

The spelling of 16535889 in words is "sixteen million, five hundred thirty-five thousand, eight hundred eighty-nine".