138388350 has 48 divisors (see below), whose sum is σ = 344085120. Its totient is φ = 36808800.

The previous prime is 138388291. The next prime is 138388357. The reversal of 138388350 is 53883831.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138388299 and 138388308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138388357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72711 + ... + 74589.

It is an arithmetic number, because the mean of its divisors is an integer number (7168440).

Almost surely, 2^138388350 is an apocalyptic number.

138388350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138388350 is an abundant number, since it is smaller than the sum of its proper divisors (205696770).

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

138388350 is a wasteful number, since it uses less digits than its factorization.

138388350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 138388350 is about 11763.8577856076. The cubic root of 138388350 is about 517.2492191992.

The spelling of 138388350 in words is "one hundred thirty-eight million, three hundred eighty-eight thousand, three hundred fifty".