138599018 has 8 divisors (see below), whose sum is σ = 208466112. Its totient is φ = 69110316.

The previous prime is 138598997. The next prime is 138599023. The reversal of 138599018 is 810995831.

It is a happy number.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 138599018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93680 + ... + 95147.

It is an arithmetic number, because the mean of its divisors is an integer number (26058264).

Almost surely, 2^138599018 is an apocalyptic number.

138599018 is a deficient number, since it is larger than the sum of its proper divisors (69867094).

138599018 is a wasteful number, since it uses less digits than its factorization.

138599018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189196.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 138599018 is about 11772.8084160068. The cubic root of 138599018 is about 517.5115548930.

The spelling of 138599018 in words is "one hundred thirty-eight million, five hundred ninety-nine thousand, eighteen".