16289138 has 4 divisors (see below), whose sum is σ = 24433710. Its totient is φ = 8144568.

The previous prime is 16289123. The next prime is 16289153. The reversal of 16289138 is 83198261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83198261 = 241 ⋅345221.

It is an interprime number because it is at equal distance from previous prime (16289123) and next prime (16289153).

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 552049 = 3967^2 + 743^2 .

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 as a sum of consecutive naturals, namely, 4072283 + ... + 4072286.

Almost surely, 2^16289138 is an apocalyptic number.

16289138 is a deficient number, since it is larger than the sum of its proper divisors (8144572).

16289138 is an equidigital number, since it uses as much as digits as its factorization.

16289138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144571.

The product of its digits is 20736, while the sum is 38.

The square root of 16289138 is about 4035.9804261171. The cubic root of 16289138 is about 253.4930368043.

The spelling of 16289138 in words is "sixteen million, two hundred eighty-nine thousand, one hundred thirty-eight".