138087012 has 24 divisors (see below), whose sum is σ = 368232256. Its totient is φ = 39453408.

The previous prime is 138087007. The next prime is 138087049. The reversal of 138087012 is 210780831.

It is a happy 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, 821863 + ... + 822030.

Almost surely, 2^138087012 is an apocalyptic number.

138087012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138087012 is an abundant number, since it is smaller than the sum of its proper divisors (230145244).

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

138087012 is a wasteful number, since it uses less digits than its factorization.

138087012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643907 (or 1643905 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 138087012 is about 11751.0430175368. The cubic root of 138087012 is about 516.8735129237.

The spelling of 138087012 in words is "one hundred thirty-eight million, eighty-seven thousand, twelve".