138244469 has 16 divisors (see below), whose sum is σ = 159899136. Its totient is φ = 118324800.

The previous prime is 138244451. The next prime is 138244471. The reversal of 138244469 is 964442831.

It is not a de Polignac number, because 138244469 - 2¹⁶ = 138178933 is a prime.

It is a super-2 number, since 2×138244469² = 38223066418183922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138244409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7139 + ... + 18095.

It is an arithmetic number, because the mean of its divisors is an integer number (9993696).

Almost surely, 2^138244469 is an apocalyptic number.

It is an amenable number.

138244469 is a deficient number, since it is larger than the sum of its proper divisors (21654667).

138244469 is a wasteful number, since it uses less digits than its factorization.

138244469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036.

The product of its digits is 165888, while the sum is 41.

The square root of 138244469 is about 11757.7408119077. The cubic root of 138244469 is about 517.0698974045.

The spelling of 138244469 in words is "one hundred thirty-eight million, two hundred forty-four thousand, four hundred sixty-nine".