16387258 has 4 divisors (see below), whose sum is σ = 24580890. Its totient is φ = 8193628.

The previous prime is 16387243. The next prime is 16387289. The reversal of 16387258 is 85278361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85278361 = 7 ⋅12182623.

It can be written as a sum of positive squares in only one way, i.e., 12131289 + 4255969 = 3483^2 + 2063^2 .

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 an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16387258.

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, 4096813 + ... + 4096816.

Almost surely, 2^16387258 is an apocalyptic number.

16387258 is a deficient number, since it is larger than the sum of its proper divisors (8193632).

16387258 is an equidigital number, since it uses as much as digits as its factorization.

16387258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193631.

The product of its digits is 80640, while the sum is 40.

The square root of 16387258 is about 4048.1178342533. The cubic root of 16387258 is about 254.0010023314.

The spelling of 16387258 in words is "sixteen million, three hundred eighty-seven thousand, two hundred fifty-eight".