138057636 has 48 divisors (see below), whose sum is σ = 327305216. Its totient is φ = 45287424.

The previous prime is 138057617. The next prime is 138057677. The reversal of 138057636 is 636750831.

It is a junction number, because it is equal to n+sod(n) for n = 138057594 and 138057603.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 238980 + ... + 239556.

Almost surely, 2^138057636 is an apocalyptic number.

It is an amenable number.

138057636 is an abundant number, since it is smaller than the sum of its proper divisors (189247580).

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

138057636 is a wasteful number, since it uses less digits than its factorization.

138057636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 138057636 is about 11749.7930194536. The cubic root of 138057636 is about 516.8368578878.

The spelling of 138057636 in words is "one hundred thirty-eight million, fifty-seven thousand, six hundred thirty-six".