138607216 has 20 divisors (see below), whose sum is σ = 292965624. Its totient is φ = 63003200.

The previous prime is 138607207. The next prime is 138607241. The reversal of 138607216 is 612706831.

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, 393595 + ... + 393946.

Almost surely, 2^138607216 is an apocalyptic number.

138607216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138607216 is an abundant number, since it is smaller than the sum of its proper divisors (154358408).

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

138607216 is a wasteful number, since it uses less digits than its factorization.

138607216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787560 (or 787554 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 138607216 is about 11773.1565860648. The cubic root of 138607216 is about 517.5217581305.

The spelling of 138607216 in words is "one hundred thirty-eight million, six hundred seven thousand, two hundred sixteen".