138003872 has 24 divisors (see below), whose sum is σ = 275421636. Its totient is φ = 68055552.

The previous prime is 138003871. The next prime is 138003881. The reversal of 138003872 is 278300831.

138003872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 135582736 + 2421136 = 11644^2 + 1556^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (138003871) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27203 + ... + 31874.

Almost surely, 2^138003872 is an apocalyptic number.

It is an amenable number.

138003872 is a deficient number, since it is larger than the sum of its proper divisors (137417764).

138003872 is an equidigital number, since it uses as much as digits as its factorization.

138003872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59160 (or 59152 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 138003872 is about 11747.5049265791. The cubic root of 138003872 is about 516.7697583163.

The spelling of 138003872 in words is "one hundred thirty-eight million, three thousand, eight hundred seventy-two".