16404336 has 160 divisors (see below), whose sum is σ = 53329920. Its totient is φ = 4790016.

The previous prime is 16404331. The next prime is 16404361. The reversal of 16404336 is 63340461.

It is a super-3 number, since 3×16404336³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 129105 + ... + 129231.

It is an arithmetic number, because the mean of its divisors is an integer number (333312).

Almost surely, 2^16404336 is an apocalyptic number.

16404336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16404336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26664960).

16404336 is an abundant number, since it is smaller than the sum of its proper divisors (36925584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16404336 is a wasteful number, since it uses less digits than its factorization.

16404336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 16404336 is about 4050.2266603241. The cubic root of 16404336 is about 254.0892075108.

Adding to 16404336 its reverse (63340461), we get a palindrome (79744797).

The spelling of 16404336 in words is "sixteen million, four hundred four thousand, three hundred thirty-six".