18079998 has 16 divisors (see below), whose sum is σ = 36205056. Its totient is φ = 6019160.

The previous prime is 18079987. The next prime is 18080003. The reversal of 18079998 is 89997081.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18079998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5683 + ... + 8273.

It is an arithmetic number, because the mean of its divisors is an integer number (2262816).

Almost surely, 2^18079998 is an apocalyptic number.

18079998 is an abundant number, since it is smaller than the sum of its proper divisors (18125058).

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

18079998 is a wasteful number, since it uses less digits than its factorization.

18079998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 18079998 is about 4252.0580899136. The cubic root of 18079998 is about 262.4618139465.

The spelling of 18079998 in words is "eighteen million, seventy-nine thousand, nine hundred ninety-eight".