138051438 has 16 divisors (see below), whose sum is σ = 315546240. Its totient is φ = 39443256.

The previous prime is 138051437. The next prime is 138051481. The reversal of 138051438 is 834150831.

It is a junction number, because it is equal to n+sod(n) for n = 138051399 and 138051408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138051437) 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 7 ways as a sum of consecutive naturals, for example, 1643428 + ... + 1643511.

It is an arithmetic number, because the mean of its divisors is an integer number (19721640).

Almost surely, 2^138051438 is an apocalyptic number.

138051438 is an abundant number, since it is smaller than the sum of its proper divisors (177494802).

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

138051438 is a wasteful number, since it uses less digits than its factorization.

138051438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286951.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 138051438 is about 11749.5292671664. The cubic root of 138051438 is about 516.8291234303.

The spelling of 138051438 in words is "one hundred thirty-eight million, fifty-one thousand, four hundred thirty-eight".