16540238 has 32 divisors (see below), whose sum is σ = 29417472. Its totient is φ = 6876000.

The previous prime is 16540229. The next prime is 16540253. The reversal of 16540238 is 83204561.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16540238.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42995 + ... + 43377.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^16540238 is an apocalyptic number.

16540238 is a deficient number, since it is larger than the sum of its proper divisors (12877234).

16540238 is a wasteful number, since it uses less digits than its factorization.

16540238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 16540238 is about 4066.9691417565. The cubic root of 16540238 is about 254.7889475017.

Adding to 16540238 its reverse (83204561), we get a palindrome (99744799).

The spelling of 16540238 in words is "sixteen million, five hundred forty thousand, two hundred thirty-eight".