16128386 has 4 divisors (see below), whose sum is σ = 24192582. Its totient is φ = 8064192.

The previous prime is 16128373. The next prime is 16128389. The reversal of 16128386 is 68382161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68382161 = 227 ⋅301243.

It can be written as a sum of positive squares in only one way, i.e., 9803161 + 6325225 = 3131^2 + 2515^2 .

It is not an unprimeable number, because it can be changed into a prime (16128389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032095 + ... + 4032098.

Almost surely, 2^16128386 is an apocalyptic number.

16128386 is a deficient number, since it is larger than the sum of its proper divisors (8064196).

16128386 is an equidigital number, since it uses as much as digits as its factorization.

16128386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8064195.

The product of its digits is 13824, while the sum is 35.

The square root of 16128386 is about 4016.0161852263. The cubic root of 16128386 is about 252.6563995274.

The spelling of 16128386 in words is "sixteen million, one hundred twenty-eight thousand, three hundred eighty-six".