138575000 has 96 divisors (see below), whose sum is σ = 340290720. Its totient is φ = 52800000.

The previous prime is 138574921. The next prime is 138575033. The reversal of 138575000 is 575831.

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 23 ways as a sum of consecutive naturals, for example, 574880 + ... + 575120.

It is an arithmetic number, because the mean of its divisors is an integer number (3544695).

Almost surely, 2^138575000 is an apocalyptic number.

138575000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138575000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170145360).

138575000 is an abundant number, since it is smaller than the sum of its proper divisors (201715720).

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

138575000 is an equidigital number, since it uses as much as digits as its factorization.

138575000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 138575000 is about 11771.7883093437. The cubic root of 138575000 is about 517.4816597544.

The spelling of 138575000 in words is "one hundred thirty-eight million, five hundred seventy-five thousand".