138965648 has 20 divisors (see below), whose sum is σ = 270326448. Its totient is φ = 69204000.

The previous prime is 138965641. The next prime is 138965663. The reversal of 138965648 is 846569831.

It is a super-3 number, since 3×138965648³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 138965596 and 138965605.

It is not an unprimeable number, because it can be changed into a prime (138965641) 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, 13286 + ... + 21317.

Almost surely, 2^138965648 is an apocalyptic number.

It is an amenable number.

138965648 is a deficient number, since it is larger than the sum of its proper divisors (131360800).

138965648 is a wasteful number, since it uses less digits than its factorization.

138965648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34862 (or 34856 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 138965648 is about 11788.3691832246. The cubic root of 138965648 is about 517.9674701177.

The spelling of 138965648 in words is "one hundred thirty-eight million, nine hundred sixty-five thousand, six hundred forty-eight".