138494216 has 32 divisors (see below), whose sum is σ = 297959040. Its totient is φ = 59117568.

The previous prime is 138494203. The next prime is 138494221. The reversal of 138494216 is 612494831.

It is a self number, because there is not a number n which added to its sum of digits gives 138494216.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9581 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (9311220).

Almost surely, 2^138494216 is an apocalyptic number.

It is an amenable number.

138494216 is an abundant number, since it is smaller than the sum of its proper divisors (159464824).

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

138494216 is a wasteful number, since it uses less digits than its factorization.

138494216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9893 (or 9889 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 138494216 is about 11768.3565547616. The cubic root of 138494216 is about 517.3810827757.

The spelling of 138494216 in words is "one hundred thirty-eight million, four hundred ninety-four thousand, two hundred sixteen".