138144535 has 24 divisors (see below), whose sum is σ = 177493680. Its totient is φ = 102930048.

The previous prime is 138144473. The next prime is 138144541. The reversal of 138144535 is 535441831.

It is not a de Polignac number, because 138144535 - 2¹³ = 138136343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138144535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592779 + ... + 593011.

It is an arithmetic number, because the mean of its divisors is an integer number (7395570).

Almost surely, 2^138144535 is an apocalyptic number.

138144535 is a deficient number, since it is larger than the sum of its proper divisors (39349145).

138144535 is an equidigital number, since it uses as much as digits as its factorization.

138144535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 336 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 138144535 is about 11753.4903326629. The cubic root of 138144535 is about 516.9452744097.

The spelling of 138144535 in words is "one hundred thirty-eight million, one hundred forty-four thousand, five hundred thirty-five".