138155000 has 40 divisors (see below), whose sum is σ = 323708880. Its totient is φ = 55260000.

The previous prime is 138154981. The next prime is 138155027. The reversal of 138155000 is 551831.

It is a tau number, because it is divible by the number of its divisors (40).

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 9 ways as a sum of consecutive naturals, for example, 8816 + ... + 18815.

It is an arithmetic number, because the mean of its divisors is an integer number (8092722).

Almost surely, 2^138155000 is an apocalyptic number.

138155000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138155000 is an abundant number, since it is smaller than the sum of its proper divisors (185553880).

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

138155000 is an equidigital number, since it uses as much as digits as its factorization.

138155000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27657 (or 27638 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 138155000 is about 11753.9355111384. The cubic root of 138155000 is about 516.9583276362.

The spelling of 138155000 in words is "one hundred thirty-eight million, one hundred fifty-five thousand".