138650 has 24 divisors (see below), whose sum is σ = 267840. Its totient is φ = 53360.

The previous prime is 138647. The next prime is 138661. The reversal of 138650 is 56831.

138650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 2321 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (11160).

2¹³⁸⁶⁵⁰ is an apocalyptic number.

138650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138650 is a deficient number, since it is larger than the sum of its proper divisors (129190).

138650 is a wasteful number, since it uses less digits than its factorization.

138650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 138650 is about 372.3573552382. The cubic root of 138650 is about 51.7575000604.

The spelling of 138650 in words is "one hundred thirty-eight thousand, six hundred fifty".