138718098 has 12 divisors (see below), whose sum is σ = 300555918. Its totient is φ = 46239360.

The previous prime is 138718093. The next prime is 138718109. The reversal of 138718098 is 890817831.

138718098 is a `hidden beast` number, since 1 + 387 + 180 + 98 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96766569 + 41951529 = 9837^2 + 6477^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138718091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3853263 + ... + 3853298.

Almost surely, 2^138718098 is an apocalyptic number.

138718098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138718098 is an abundant number, since it is smaller than the sum of its proper divisors (161837820).

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

138718098 is a wasteful number, since it uses less digits than its factorization.

138718098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706569 (or 7706566 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 138718098 is about 11777.8647470584. The cubic root of 138718098 is about 517.6597224544.

The spelling of 138718098 in words is "one hundred thirty-eight million, seven hundred eighteen thousand, ninety-eight".