138764 has 12 divisors (see below), whose sum is σ = 245784. Its totient is φ = 68544.

The previous prime is 138763. The next prime is 138793. The reversal of 138764 is 467831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 605.

It is an arithmetic number, because the mean of its divisors is an integer number (20482).

2¹³⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

138764 is a deficient number, since it is larger than the sum of its proper divisors (107020).

138764 is a wasteful number, since it uses less digits than its factorization.

138764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 138764 is about 372.5104025393. The cubic root of 138764 is about 51.7716814251.

The spelling of 138764 in words is "one hundred thirty-eight thousand, seven hundred sixty-four".