138045887 has 24 divisors (see below), whose sum is σ = 174898800. Its totient is φ = 108210816.

The previous prime is 138045881. The next prime is 138045917. The reversal of 138045887 is 788540831.

It is not a de Polignac number, because 138045887 - 2⁴ = 138045871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138045881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24443 + ... + 29555.

It is an arithmetic number, because the mean of its divisors is an integer number (7287450).

Almost surely, 2^138045887 is an apocalyptic number.

138045887 is a deficient number, since it is larger than the sum of its proper divisors (36852913).

138045887 is a wasteful number, since it uses less digits than its factorization.

138045887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175 (or 5168 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 138045887 is about 11749.2930425622. The cubic root of 138045887 is about 516.8221961647.

It can be divided in two parts, 13804 and 5887, that added together give a palindrome (19691).

The spelling of 138045887 in words is "one hundred thirty-eight million, forty-five thousand, eight hundred eighty-seven".