16404338 has 8 divisors (see below), whose sum is σ = 24769920. Its totient is φ = 8147700.

The previous prime is 16404331. The next prime is 16404361. The reversal of 16404338 is 83340461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×16404338³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16404338.

It is not an unprimeable number, because it can be changed into a prime (16404331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26858 + ... + 27461.

It is an arithmetic number, because the mean of its divisors is an integer number (3096240).

Almost surely, 2^16404338 is an apocalyptic number.

16404338 is a deficient number, since it is larger than the sum of its proper divisors (8365582).

16404338 is a wasteful number, since it uses less digits than its factorization.

16404338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54472.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 16404338 is about 4050.2269072238. The cubic root of 16404338 is about 254.0892178369.

Adding to 16404338 its reverse (83340461), we get a palindrome (99744799).

The spelling of 16404338 in words is "sixteen million, four hundred four thousand, three hundred thirty-eight".