138582738 has 40 divisors (see below), whose sum is σ = 354892032. Its totient is φ = 39594744.

The previous prime is 138582721. The next prime is 138582739. The reversal of 138582738 is 837285831.

138582738 is a `hidden beast` number, since 1 + 38 + 582 + 7 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 138582693 and 138582702.

It is not an unprimeable number, because it can be changed into a prime (138582739) 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 19 ways as a sum of consecutive naturals, for example, 59970 + ... + 62237.

Almost surely, 2^138582738 is an apocalyptic number.

138582738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138582738 is an abundant number, since it is smaller than the sum of its proper divisors (216309294).

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

138582738 is a wasteful number, since it uses less digits than its factorization.

138582738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122228 (or 122219 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 138582738 is about 11772.1169718959. The cubic root of 138582738 is about 517.4912915989.

The spelling of 138582738 in words is "one hundred thirty-eight million, five hundred eighty-two thousand, seven hundred thirty-eight".