138385750 has 16 divisors (see below), whose sum is σ = 259058592. Its totient is φ = 55354200.

The previous prime is 138385747. The next prime is 138385771. The reversal of 138385750 is 57583831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276522 + ... + 277021.

It is an arithmetic number, because the mean of its divisors is an integer number (16191162).

Almost surely, 2^138385750 is an apocalyptic number.

138385750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138385750 is a deficient number, since it is larger than the sum of its proper divisors (120672842).

138385750 is an equidigital number, since it uses as much as digits as its factorization.

138385750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553560 (or 553550 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 138385750 is about 11763.7472771222. The cubic root of 138385750 is about 517.2459798697.

The spelling of 138385750 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, seven hundred fifty".