18078112 has 24 divisors (see below), whose sum is σ = 38329956. Its totient is φ = 8343552.

The previous prime is 18078097. The next prime is 18078113. The reversal of 18078112 is 21187081.

It can be written as a sum of positive squares in 2 ways, for example, as 17673616 + 404496 = 4204^2 + 636^2 .

It is not an unprimeable number, because it can be changed into a prime (18078113) 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, 21313 + ... + 22144.

Almost surely, 2^18078112 is an apocalyptic number.

It is an amenable number.

18078112 is an abundant number, since it is smaller than the sum of its proper divisors (20251844).

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

18078112 is a wasteful number, since it uses less digits than its factorization.

18078112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43480 (or 43472 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 18078112 is about 4251.8363091728. The cubic root of 18078112 is about 262.4526874669.

The spelling of 18078112 in words is "eighteen million, seventy-eight thousand, one hundred twelve".