138819498 has 8 divisors (see below), whose sum is σ = 277639008. Its totient is φ = 46273164.

The previous prime is 138819493. The next prime is 138819517. The reversal of 138819498 is 894918831.

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

138819498 is an admirable number.

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 138819498.

It is not an unprimeable number, because it can be changed into a prime (138819493) 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 3 ways as a sum of consecutive naturals, for example, 11568286 + ... + 11568297.

It is an arithmetic number, because the mean of its divisors is an integer number (34704876).

Almost surely, 2^138819498 is an apocalyptic number.

138819498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138819498 is a wasteful number, since it uses less digits than its factorization.

138819498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23136588.

The product of its digits is 497664, while the sum is 51.

The square root of 138819498 is about 11782.1686458818. The cubic root of 138819498 is about 517.7858245083.

The spelling of 138819498 in words is "one hundred thirty-eight million, eight hundred nineteen thousand, four hundred ninety-eight".