138448170 has 256 divisors, whose sum is σ = 464486400. Its totient is φ = 28615680.

The previous prime is 138448169. The next prime is 138448183. The reversal of 138448170 is 71844831.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 995961 + ... + 996099.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^138448170 is an apocalyptic number.

138448170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138448170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232243200).

138448170 is an abundant number, since it is smaller than the sum of its proper divisors (326038230).

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

138448170 is a wasteful number, since it uses less digits than its factorization.

138448170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 138448170 is about 11766.4000441936. The cubic root of 138448170 is about 517.3237374927.

The spelling of 138448170 in words is "one hundred thirty-eight million, four hundred forty-eight thousand, one hundred seventy".