138423000 has 64 divisors (see below), whose sum is σ = 431889120. Its totient is φ = 36912000.

The previous prime is 138422987. The next prime is 138423053. The reversal of 138423000 is 324831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20071 + ... + 26070.

Almost surely, 2^138423000 is an apocalyptic number.

138423000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138423000 is an abundant number, since it is smaller than the sum of its proper divisors (293466120).

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

138423000 is a wasteful number, since it uses less digits than its factorization.

138423000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46165 (or 46151 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 138423000 is about 11765.3304245992. The cubic root of 138423000 is about 517.2923856213.

Adding to 138423000 its reverse (324831), we get a palindrome (138747831).

The spelling of 138423000 in words is "one hundred thirty-eight million, four hundred twenty-three thousand".