16404885 has 48 divisors (see below), whose sum is σ = 34220160. Its totient is φ = 7102080.

The previous prime is 16404863. The next prime is 16404937. The reversal of 16404885 is 58840461.

16404885 is a `hidden beast` number, since 1 + 640 + 4 + 8 + 8 + 5 = 666.

It is not a de Polignac number, because 16404885 - 2⁶ = 16404821 is a prime.

It is a Curzon number.

It is a congruent 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 in 47 ways as a sum of consecutive naturals, for example, 4615 + ... + 7355.

It is an arithmetic number, because the mean of its divisors is an integer number (712920).

Almost surely, 2^16404885 is an apocalyptic number.

16404885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16404885 is an abundant number, since it is smaller than the sum of its proper divisors (17815275).

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

16404885 is a wasteful number, since it uses less digits than its factorization.

16404885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2775 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 16404885 is about 4050.2944337418. The cubic root of 16404885 is about 254.0920419935.

The spelling of 16404885 in words is "sixteen million, four hundred four thousand, eight hundred eighty-five".