138762438 has 8 divisors (see below), whose sum is σ = 277524888. Its totient is φ = 46254144.

The previous prime is 138762431. The next prime is 138762439. The reversal of 138762438 is 834267831.

It is a sphenic number, since it is the product of 3 distinct primes.

138762438 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 138762438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138762431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11563531 + ... + 11563542.

It is an arithmetic number, because the mean of its divisors is an integer number (34690611).

Almost surely, 2^138762438 is an apocalyptic number.

138762438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138762438 is a wasteful number, since it uses less digits than its factorization.

138762438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23127078.

The product of its digits is 193536, while the sum is 42.

The square root of 138762438 is about 11779.7469412547. The cubic root of 138762438 is about 517.7148716798.

The spelling of 138762438 in words is "one hundred thirty-eight million, seven hundred sixty-two thousand, four hundred thirty-eight".