138820036 has 12 divisors (see below), whose sum is σ = 243370512. Its totient is φ = 69285608.

The previous prime is 138820027. The next prime is 138820057. The reversal of 138820036 is 630028831.

It is an unprimeable number.

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, 28570 + ... + 33073.

It is an arithmetic number, because the mean of its divisors is an integer number (20280876).

Almost surely, 2^138820036 is an apocalyptic number.

It is an amenable number.

138820036 is a deficient number, since it is larger than the sum of its proper divisors (104550476).

138820036 is a wasteful number, since it uses less digits than its factorization.

138820036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62210 (or 62208 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 138820036 is about 11782.1914769707. The cubic root of 138820036 is about 517.7864934067.

Adding to 138820036 its reverse (630028831), we get a palindrome (768848867).

The spelling of 138820036 in words is "one hundred thirty-eight million, eight hundred twenty thousand, thirty-six".