18057078 has 24 divisors (see below), whose sum is σ = 42133728. Its totient is φ = 5555952.

The previous prime is 18057031. The next prime is 18057079. The reversal of 18057078 is 87075081.

18057078 is a `hidden beast` number, since 1 + 80 + 570 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18057079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38350 + ... + 38817.

It is an arithmetic number, because the mean of its divisors is an integer number (1755572).

Almost surely, 2^18057078 is an apocalyptic number.

18057078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18057078 is an abundant number, since it is smaller than the sum of its proper divisors (24076650).

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

18057078 is a wasteful number, since it uses less digits than its factorization.

18057078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77188 (or 77185 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 18057078 is about 4249.3620697700. The cubic root of 18057078 is about 262.3508594989.

The spelling of 18057078 in words is "eighteen million, fifty-seven thousand, seventy-eight".