18804408 has 64 divisors (see below), whose sum is σ = 54120960. Its totient is φ = 5333376.

The previous prime is 18804389. The next prime is 18804413. The reversal of 18804408 is 80440881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28741 + ... + 29387.

It is an arithmetic number, because the mean of its divisors is an integer number (845640).

Almost surely, 2^18804408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18804408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27060480).

18804408 is an abundant number, since it is smaller than the sum of its proper divisors (35316552).

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

18804408 is a wasteful number, since it uses less digits than its factorization.

18804408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18804408 is about 4336.4049626390. The cubic root of 18804408 is about 265.9213591561.

The spelling of 18804408 in words is "eighteen million, eight hundred four thousand, four hundred eight".