16281138 has 64 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 4665600.

The previous prime is 16281127. The next prime is 16281143. The reversal of 16281138 is 83118261.

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 31 ways as a sum of consecutive naturals, for example, 59943 + ... + 60213.

It is an arithmetic number, because the mean of its divisors is an integer number (587520).

Almost surely, 2^16281138 is an apocalyptic number.

16281138 is an abundant number, since it is smaller than the sum of its proper divisors (21320142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16281138 is a wasteful number, since it uses less digits than its factorization.

16281138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343.

The product of its digits is 2304, while the sum is 30.

The square root of 16281138 is about 4034.9892193165. The cubic root of 16281138 is about 253.4515311012.

Adding to 16281138 its reverse (83118261), we get a palindrome (99399399).

The spelling of 16281138 in words is "sixteen million, two hundred eighty-one thousand, one hundred thirty-eight".