18128028 has 12 divisors (see below), whose sum is σ = 42298760. Its totient is φ = 6042672.

The previous prime is 18128023. The next prime is 18128053. The reversal of 18128028 is 82082181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18127986 and 18128004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18128023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755323 + ... + 755346.

Almost surely, 2^18128028 is an apocalyptic number.

It is an amenable number.

18128028 is an abundant number, since it is smaller than the sum of its proper divisors (24170732).

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

18128028 is a wasteful number, since it uses less digits than its factorization.

18128028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510676 (or 1510674 counting only the distinct ones).

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

The square root of 18128028 is about 4257.7021971951. The cubic root of 18128028 is about 262.6940207311.

The spelling of 18128028 in words is "eighteen million, one hundred twenty-eight thousand, twenty-eight".