18129128 has 32 divisors (see below), whose sum is σ = 34884000. Its totient is φ = 8830272.

The previous prime is 18129121. The next prime is 18129131. The reversal of 18129128 is 82192181.

It is a junction number, because it is equal to n+sod(n) for n = 18129094 and 18129103.

It is not an unprimeable number, because it can be changed into a prime (18129121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79751 + ... + 79977.

It is an arithmetic number, because the mean of its divisors is an integer number (1090125).

Almost surely, 2^18129128 is an apocalyptic number.

It is an amenable number.

18129128 is a deficient number, since it is larger than the sum of its proper divisors (16754872).

18129128 is a wasteful number, since it uses less digits than its factorization.

18129128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 445 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 18129128 is about 4257.8313728940. The cubic root of 18129128 is about 262.6993340058.

The spelling of 18129128 in words is "eighteen million, one hundred twenty-nine thousand, one hundred twenty-eight".