16409002 has 4 divisors (see below), whose sum is σ = 24613506. Its totient is φ = 8204500.

The previous prime is 16408999. The next prime is 16409039. The reversal of 16409002 is 20090461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20090461 = 257 ⋅78173.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 95481 = 4039^2 + 309^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 4102249 + ... + 4102252.

Almost surely, 2^16409002 is an apocalyptic number.

16409002 is a deficient number, since it is larger than the sum of its proper divisors (8204504).

16409002 is an equidigital number, since it uses as much as digits as its factorization.

16409002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204503.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16409002 is about 4050.8026365154. The cubic root of 16409002 is about 254.1132960171.

Adding to 16409002 its reverse (20090461), we get a palindrome (36499463).

The spelling of 16409002 in words is "sixteen million, four hundred nine thousand, two".