138198516 has 12 divisors (see below), whose sum is σ = 322463232. Its totient is φ = 46066168.

The previous prime is 138198509. The next prime is 138198583. The reversal of 138198516 is 615891831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 5758260 + ... + 5758283.

It is an arithmetic number, because the mean of its divisors is an integer number (26871936).

Almost surely, 2^138198516 is an apocalyptic number.

It is an amenable number.

138198516 is an abundant number, since it is smaller than the sum of its proper divisors (184264716).

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

138198516 is a wasteful number, since it uses less digits than its factorization.

138198516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11516550 (or 11516548 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 138198516 is about 11755.7864900652. The cubic root of 138198516 is about 517.0125990392.

The spelling of 138198516 in words is "one hundred thirty-eight million, one hundred ninety-eight thousand, five hundred sixteen".