138869152 has 24 divisors (see below), whose sum is σ = 273786912. Its totient is φ = 69336000.

The previous prime is 138869149. The next prime is 138869153. The reversal of 138869152 is 251968831.

It is a junction number, because it is equal to n+sod(n) for n = 138869099 and 138869108.

It is not an unprimeable number, because it can be changed into a prime (138869153) 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, 23277 + ... + 28627.

It is an arithmetic number, because the mean of its divisors is an integer number (11407788).

Almost surely, 2^138869152 is an apocalyptic number.

It is an amenable number.

138869152 is a deficient number, since it is larger than the sum of its proper divisors (134917760).

138869152 is an equidigital number, since it uses as much as digits as its factorization.

138869152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6164 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 138869152 is about 11784.2756247467. The cubic root of 138869152 is about 517.8475523225.

The spelling of 138869152 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, one hundred fifty-two".