138213950 has 24 divisors (see below), whose sum is σ = 293804112. Its totient is φ = 47387520.

The previous prime is 138213947. The next prime is 138213967. The reversal of 138213950 is 59312831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197099 + ... + 197798.

It is an arithmetic number, because the mean of its divisors is an integer number (12241838).

Almost surely, 2^138213950 is an apocalyptic number.

138213950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138213950 is an abundant number, since it is smaller than the sum of its proper divisors (155590162).

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

138213950 is a wasteful number, since it uses less digits than its factorization.

138213950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394916 (or 394911 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 138213950 is about 11756.4429144193. The cubic root of 138213950 is about 517.0318449657.

It can be divided in two parts, 13821 and 3950, that added together give a palindrome (17771).

The spelling of 138213950 in words is "one hundred thirty-eight million, two hundred thirteen thousand, nine hundred fifty".