138488 has 16 divisors (see below), whose sum is σ = 296880. Its totient is φ = 59328.

The previous prime is 138469. The next prime is 138493. The reversal of 138488 is 884831.

138488 is nontrivially palindromic in base 11.

138488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138488² = 38357852288, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138488.

It is an unprimeable number.

138488 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (18555).

2¹³⁸⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

138488 is an abundant number, since it is smaller than the sum of its proper divisors (158392).

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

138488 is a wasteful number, since it uses less digits than its factorization.

138488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 2482 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 138488 is about 372.1397586929. The cubic root of 138488 is about 51.7373342166.

It can be divided in two parts, 138 and 488, that added together give a palindrome (626).

The spelling of 138488 in words is "one hundred thirty-eight thousand, four hundred eighty-eight".