138263216 has 40 divisors (see below), whose sum is σ = 329708064. Its totient is φ = 54696960.

The previous prime is 138263207. The next prime is 138263231. The reversal of 138263216 is 612362831.

138263216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 46025 + ... + 48936.

Almost surely, 2^138263216 is an apocalyptic number.

138263216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138263216 is an abundant number, since it is smaller than the sum of its proper divisors (191444848).

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

138263216 is a wasteful number, since it uses less digits than its factorization.

138263216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94989 (or 94983 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 138263216 is about 11758.5380043609. The cubic root of 138263216 is about 517.0932692165.

The spelling of 138263216 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, two hundred sixteen".