138556750 has 32 divisors (see below), whose sum is σ = 265430880. Its totient is φ = 54129600.

The previous prime is 138556709. The next prime is 138556801. The reversal of 138556750 is 57655831.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4306 + ... + 17194.

It is an arithmetic number, because the mean of its divisors is an integer number (8294715).

Almost surely, 2^138556750 is an apocalyptic number.

138556750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138556750 is a deficient number, since it is larger than the sum of its proper divisors (126874130).

138556750 is a wasteful number, since it uses less digits than its factorization.

138556750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12949 (or 12939 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 138556750 is about 11771.0131254706. The cubic root of 138556750 is about 517.4589417199.

The spelling of 138556750 in words is "one hundred thirty-eight million, five hundred fifty-six thousand, seven hundred fifty".