138856 has 16 divisors (see below), whose sum is σ = 275940. Its totient is φ = 65280.

The previous prime is 138841. The next prime is 138863. The reversal of 138856 is 658831.

It can be written as a sum of positive squares in 2 ways, for example, as 133956 + 4900 = 366^2 + 70^2 .

It is an unprimeable number.

138856 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, 375 + ... + 646.

2¹³⁸⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

138856 is a deficient number, since it is larger than the sum of its proper divisors (137084).

138856 is a wasteful number, since it uses less digits than its factorization.

138856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1040 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 138856 is about 372.6338685627. The cubic root of 138856 is about 51.7831203729.

It can be divided in two parts, 1388 and 56, that added together give a square (1444 = 38²).

The spelling of 138856 in words is "one hundred thirty-eight thousand, eight hundred fifty-six".