138503788 has 12 divisors (see below), whose sum is σ = 243834192. Its totient is φ = 68836880.

The previous prime is 138503779. The next prime is 138503789. The reversal of 138503788 is 887305831.

It is not an unprimeable number, because it can be changed into a prime (138503789) 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 3 ways as a sum of consecutive naturals, for example, 103003 + ... + 104338.

It is an arithmetic number, because the mean of its divisors is an integer number (20319516).

Almost surely, 2^138503788 is an apocalyptic number.

It is an amenable number.

138503788 is a deficient number, since it is larger than the sum of its proper divisors (105330404).

138503788 is a wasteful number, since it uses less digits than its factorization.

138503788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207512 (or 207510 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 138503788 is about 11768.7632315380. The cubic root of 138503788 is about 517.3930020644.

The spelling of 138503788 in words is "one hundred thirty-eight million, five hundred three thousand, seven hundred eighty-eight".