138883756 has 12 divisors (see below), whose sum is σ = 265141800. Its totient is φ = 63128960.

The previous prime is 138883649. The next prime is 138883757. The reversal of 138883756 is 657388831.

It is not an unprimeable number, because it can be changed into a prime (138883757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578181 + ... + 1578268.

It is an arithmetic number, because the mean of its divisors is an integer number (22095150).

Almost surely, 2^138883756 is an apocalyptic number.

It is an amenable number.

138883756 is a deficient number, since it is larger than the sum of its proper divisors (126258044).

138883756 is a wasteful number, since it uses less digits than its factorization.

138883756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156464 (or 3156462 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 138883756 is about 11784.8952477313. The cubic root of 138883756 is about 517.8657046154.

The spelling of 138883756 in words is "one hundred thirty-eight million, eight hundred eighty-three thousand, seven hundred fifty-six".