138466750 has 16 divisors (see below), whose sum is σ = 259210224. Its totient is φ = 55386600.

The previous prime is 138466709. The next prime is 138466753. The reversal of 138466750 is 57664831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138466753) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 276684 + ... + 277183.

It is an arithmetic number, because the mean of its divisors is an integer number (16200639).

Almost surely, 2^138466750 is an apocalyptic number.

138466750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138466750 is a deficient number, since it is larger than the sum of its proper divisors (120743474).

138466750 is an equidigital number, since it uses as much as digits as its factorization.

138466750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553884 (or 553874 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 138466750 is about 11767.1895540099. The cubic root of 138466750 is about 517.3468783910.

The spelling of 138466750 in words is "one hundred thirty-eight million, four hundred sixty-six thousand, seven hundred fifty".