16502138 has 16 divisors (see below), whose sum is σ = 26286120. Its totient is φ = 7742976.

The previous prime is 16502119. The next prime is 16502141. The reversal of 16502138 is 83120561.

It can be written as a sum of positive squares in 4 ways, for example, as 9653449 + 6848689 = 3107^2 + 2617^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18920 + ... + 19772.

Almost surely, 2^16502138 is an apocalyptic number.

16502138 is a deficient number, since it is larger than the sum of its proper divisors (9783982).

16502138 is a wasteful number, since it uses less digits than its factorization.

16502138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 16502138 is about 4062.2823634011. The cubic root of 16502138 is about 254.5931639005.

Adding to 16502138 its reverse (83120561), we get a palindrome (99622699).

The spelling of 16502138 in words is "sixteen million, five hundred two thousand, one hundred thirty-eight".