13998018 has 16 divisors (see below), whose sum is σ = 28066176. Its totient is φ = 4654320.

The previous prime is 13998013. The next prime is 13998043. The reversal of 13998018 is 81089931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13998013) 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 7 ways as a sum of consecutive naturals, for example, 121 + ... + 5292.

It is an arithmetic number, because the mean of its divisors is an integer number (1754136).

Almost surely, 2^13998018 is an apocalyptic number.

13998018 is an abundant number, since it is smaller than the sum of its proper divisors (14068158).

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

13998018 is a wasteful number, since it uses less digits than its factorization.

13998018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 13998018 is about 3741.3925215085. The cubic root of 13998018 is about 241.0028523046.

The spelling of 13998018 in words is "thirteen million, nine hundred ninety-eight thousand, eighteen".