138900216 has 64 divisors (see below), whose sum is σ = 427392000. Its totient is φ = 36632448.

The previous prime is 138900199. The next prime is 138900221. The reversal of 138900216 is 612009831.

138900216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29616 + ... + 33983.

It is an arithmetic number, because the mean of its divisors is an integer number (6678000).

Almost surely, 2^138900216 is an apocalyptic number.

It is an amenable number.

138900216 is an abundant number, since it is smaller than the sum of its proper divisors (288491784).

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

138900216 is a wasteful number, since it uses less digits than its factorization.

138900216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63628 (or 63624 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 138900216 is about 11785.5935786026. The cubic root of 138900216 is about 517.8861623301.

The spelling of 138900216 in words is "one hundred thirty-eight million, nine hundred thousand, two hundred sixteen".