18078144 has 56 divisors (see below), whose sum is σ = 54668928. Its totient is φ = 5164800.

The previous prime is 18078121. The next prime is 18078149. The reversal of 18078144 is 44187081.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078149) 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 7 ways as a sum of consecutive naturals, for example, 5382 + ... + 8069.

Almost surely, 2^18078144 is an apocalyptic number.

18078144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18078144 is an abundant number, since it is smaller than the sum of its proper divisors (36590784).

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

18078144 is a wasteful number, since it uses less digits than its factorization.

18078144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13473 (or 13463 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 18078144 is about 4251.8400722511. The cubic root of 18078144 is about 262.4528423224.

The spelling of 18078144 in words is "eighteen million, seventy-eight thousand, one hundred forty-four".