138553748 has 24 divisors (see below), whose sum is σ = 253471680. Its totient is φ = 66144320.

The previous prime is 138553747. The next prime is 138553769. The reversal of 138553748 is 847355831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 138553699 and 138553708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138553741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69023 + ... + 71001.

It is an arithmetic number, because the mean of its divisors is an integer number (10561320).

Almost surely, 2^138553748 is an apocalyptic number.

It is an amenable number.

138553748 is a deficient number, since it is larger than the sum of its proper divisors (114917932).

138553748 is a wasteful number, since it uses less digits than its factorization.

138553748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767 (or 2765 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 138553748 is about 11770.8856081435. The cubic root of 138553748 is about 517.4552045677.

The spelling of 138553748 in words is "one hundred thirty-eight million, five hundred fifty-three thousand, seven hundred forty-eight".