138738282 has 8 divisors (see below), whose sum is σ = 277476576. Its totient is φ = 46246092.

The previous prime is 138738269. The next prime is 138738283. The reversal of 138738282 is 282837831.

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

138738282 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138738283) 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 3 ways as a sum of consecutive naturals, for example, 11561518 + ... + 11561529.

It is an arithmetic number, because the mean of its divisors is an integer number (34684572).

Almost surely, 2^138738282 is an apocalyptic number.

138738282 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.

138738282 is a wasteful number, since it uses less digits than its factorization.

138738282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23123052.

The product of its digits is 129024, while the sum is 42.

The square root of 138738282 is about 11778.7215774888. The cubic root of 138738282 is about 517.6848283761.

It can be divided in two parts, 13873 and 8282, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 138738282 in words is "one hundred thirty-eight million, seven hundred thirty-eight thousand, two hundred eighty-two".