138482198 has 4 divisors (see below), whose sum is σ = 207723300. Its totient is φ = 69241098.

The previous prime is 138482191. The next prime is 138482207. The reversal of 138482198 is 891284831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891284831 = 131 ⋅6803701.

It is a super-2 number, since 2×138482198² = 38354638325822408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138482191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34620548 + ... + 34620551.

It is an arithmetic number, because the mean of its divisors is an integer number (51930825).

Almost surely, 2^138482198 is an apocalyptic number.

138482198 is a deficient number, since it is larger than the sum of its proper divisors (69241102).

138482198 is an equidigital number, since it uses as much as digits as its factorization.

138482198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69241101.

The product of its digits is 110592, while the sum is 44.

The square root of 138482198 is about 11767.8459371289. The cubic root of 138482198 is about 517.3661168903.

The spelling of 138482198 in words is "one hundred thirty-eight million, four hundred eighty-two thousand, one hundred ninety-eight".