138438110 has 8 divisors (see below), whose sum is σ = 249188616. Its totient is φ = 55375240.

The previous prime is 138438101. The next prime is 138438133. The reversal of 138438110 is 11834831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138438110² = 38330220600744200, which contains 22 as substring.

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, 6921896 + ... + 6921915.

It is an arithmetic number, because the mean of its divisors is an integer number (31148577).

Almost surely, 2^138438110 is an apocalyptic number.

138438110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138438110 is a deficient number, since it is larger than the sum of its proper divisors (110750506).

138438110 is a wasteful number, since it uses less digits than its factorization.

138438110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13843818.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 138438110 is about 11765.9725479877. The cubic root of 138438110 is about 517.3112071649.

The spelling of 138438110 in words is "one hundred thirty-eight million, four hundred thirty-eight thousand, one hundred ten".