18398079 has 18 divisors (see below), whose sum is σ = 30914520. Its totient is φ = 10512936.

The previous prime is 18398071. The next prime is 18398101. The reversal of 18398079 is 97089381.

It is not a de Polignac number, because 18398079 - 2³ = 18398071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18398071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20419 + ... + 21300.

Almost surely, 2^18398079 is an apocalyptic number.

18398079 is a deficient number, since it is larger than the sum of its proper divisors (12516441).

18398079 is a wasteful number, since it uses less digits than its factorization.

18398079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41739 (or 41729 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18398079 is about 4289.2981943437. The cubic root of 18398079 is about 263.9920366055.

The spelling of 18398079 in words is "eighteen million, three hundred ninety-eight thousand, seventy-nine".