138868852 has 12 divisors (see below), whose sum is σ = 257315940. Its totient is φ = 65350016.

The previous prime is 138868841. The next prime is 138868861. The reversal of 138868852 is 258868831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99480676 + 39388176 = 9974^2 + 6276^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138868796 and 138868805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021027 + ... + 1021162.

It is an arithmetic number, because the mean of its divisors is an integer number (21442995).

Almost surely, 2^138868852 is an apocalyptic number.

It is an amenable number.

138868852 is a deficient number, since it is larger than the sum of its proper divisors (118447088).

138868852 is a wasteful number, since it uses less digits than its factorization.

138868852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042210 (or 2042208 counting only the distinct ones).

The product of its digits is 737280, while the sum is 49.

The square root of 138868852 is about 11784.2628959133. The cubic root of 138868852 is about 517.8471794190.

The spelling of 138868852 in words is "one hundred thirty-eight million, eight hundred sixty-eight thousand, eight hundred fifty-two".