138251384 has 32 divisors (see below), whose sum is σ = 263741520. Its totient is φ = 67931136.

The previous prime is 138251371. The next prime is 138251387. The reversal of 138251384 is 483152831.

It is a happy number.

It is a super-2 number, since 2×138251384² = 38226890355830912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138251387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125942 + ... + 127034.

Almost surely, 2^138251384 is an apocalyptic number.

It is an amenable number.

138251384 is a deficient number, since it is larger than the sum of its proper divisors (125490136).

138251384 is a wasteful number, since it uses less digits than its factorization.

138251384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359 (or 1355 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 138251384 is about 11758.0348698241. The cubic root of 138251384 is about 517.0785185540.

The spelling of 138251384 in words is "one hundred thirty-eight million, two hundred fifty-one thousand, three hundred eighty-four".