18128706 has 16 divisors (see below), whose sum is σ = 36319104. Its totient is φ = 6032624.

The previous prime is 18128687. The next prime is 18128729. The reversal of 18128706 is 60782181.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1831 + ... + 6293.

It is an arithmetic number, because the mean of its divisors is an integer number (2269944).

Almost surely, 2^18128706 is an apocalyptic number.

18128706 is an abundant number, since it is smaller than the sum of its proper divisors (18190398).

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

18128706 is a wasteful number, since it uses less digits than its factorization.

18128706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18128706 is about 4257.7818168619. The cubic root of 18128706 is about 262.6972956659.

The spelling of 18128706 in words is "eighteen million, one hundred twenty-eight thousand, seven hundred six".