16849138 has 4 divisors (see below), whose sum is σ = 25273710. Its totient is φ = 8424568.

The previous prime is 16849127. The next prime is 16849139. The reversal of 16849138 is 83194861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83194861 = 1721 ⋅48341.

It can be written as a sum of positive squares in only one way, i.e., 13935289 + 2913849 = 3733^2 + 1707^2 .

It is a Smith number, since the sum of its digits (40) 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 16849138.

It is not an unprimeable number, because it can be changed into a prime (16849139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212283 + ... + 4212286.

Almost surely, 2^16849138 is an apocalyptic number.

16849138 is a deficient number, since it is larger than the sum of its proper divisors (8424572).

16849138 is an equidigital number, since it uses as much as digits as its factorization.

16849138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424571.

The product of its digits is 41472, while the sum is 40.

The square root of 16849138 is about 4104.7701519086. The cubic root of 16849138 is about 256.3652927159.

The spelling of 16849138 in words is "sixteen million, eight hundred forty-nine thousand, one hundred thirty-eight".