16005394 has 4 divisors (see below), whose sum is σ = 24008094. Its totient is φ = 8002696.

The previous prime is 16005389. The next prime is 16005413. The reversal of 16005394 is 49350061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 45369 = 3995^2 + 213^2 .

It is an unprimeable number.

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, 4001347 + ... + 4001350.

Almost surely, 2^16005394 is an apocalyptic number.

16005394 is a deficient number, since it is larger than the sum of its proper divisors (8002700).

16005394 is an equidigital number, since it uses as much as digits as its factorization.

16005394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8002699.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16005394 is about 4000.6741931829. The cubic root of 16005394 is about 252.0125235231.

The spelling of 16005394 in words is "sixteen million, five thousand, three hundred ninety-four".