138900650 has 48 divisors (see below), whose sum is σ = 298207104. Its totient is φ = 47148480.

The previous prime is 138900649. The next prime is 138900653. The reversal of 138900650 is 56009831.

138900650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138900653) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 34124 + ... + 37976.

It is an arithmetic number, because the mean of its divisors is an integer number (6212648).

Almost surely, 2^138900650 is an apocalyptic number.

138900650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138900650 is an abundant number, since it is smaller than the sum of its proper divisors (159306454).

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

138900650 is a wasteful number, since it uses less digits than its factorization.

138900650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 138900650 is about 11785.6119908981. The cubic root of 138900650 is about 517.8867017158.

The spelling of 138900650 in words is "one hundred thirty-eight million, nine hundred thousand, six hundred fifty".