138995952 has 40 divisors (see below), whose sum is σ = 367428864. Its totient is φ = 45253824.

The previous prime is 138995933. The next prime is 138995999. The reversal of 138995952 is 259599831.

It is a junction number, because it is equal to n+sod(n) for n = 138995895 and 138995904.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31608 + ... + 35735.

Almost surely, 2^138995952 is an apocalyptic number.

138995952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138995952 is an abundant number, since it is smaller than the sum of its proper divisors (228432912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138995952 is a wasteful number, since it uses less digits than its factorization.

138995952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67397 (or 67391 counting only the distinct ones).

The product of its digits is 874800, while the sum is 51.

The square root of 138995952 is about 11789.6544478623. The cubic root of 138995952 is about 518.0051181399.

The spelling of 138995952 in words is "one hundred thirty-eight million, nine hundred ninety-five thousand, nine hundred fifty-two".