18078079 has 8 divisors (see below), whose sum is σ = 18372240. Its totient is φ = 17786496.

The previous prime is 18078077. The next prime is 18078083. The reversal of 18078079 is 97087081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18078079 - 2¹ = 18078077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078077) 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, 17232 + ... + 18250.

It is an arithmetic number, because the mean of its divisors is an integer number (2296530).

Almost surely, 2^18078079 is an apocalyptic number.

18078079 is a deficient number, since it is larger than the sum of its proper divisors (294161).

18078079 is a wasteful number, since it uses less digits than its factorization.

18078079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 18078079 is about 4251.8324284948. The cubic root of 18078079 is about 262.4525277721.

The spelling of 18078079 in words is "eighteen million, seventy-eight thousand, seventy-nine".