18208128 has 32 divisors (see below), whose sum is σ = 48366360. Its totient is φ = 6069248.

The previous prime is 18208103. The next prime is 18208133. The reversal of 18208128 is 82180281.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 18208095 and 18208104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23325 + ... + 24092.

Almost surely, 2^18208128 is an apocalyptic number.

It is an amenable number.

18208128 is an abundant number, since it is smaller than the sum of its proper divisors (30158232).

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

18208128 is an equidigital number, since it uses as much as digits as its factorization.

18208128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47434 (or 47422 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 18208128 is about 4267.0983114993. The cubic root of 18208128 is about 263.0803630911.

It can be divided in two parts, 18208 and 128, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 18208128 in words is "eighteen million, two hundred eight thousand, one hundred twenty-eight".