138448575 has 48 divisors (see below), whose sum is σ = 255459840. Its totient is φ = 73513440.

The previous prime is 138448571. The next prime is 138448577. The reversal of 138448575 is 575844831.

138448575 is a `hidden beast` number, since 1 + 38 + 4 + 48 + 575 = 666.

It is not a de Polignac number, because 138448575 - 2² = 138448571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138448575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138448571) 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 47 ways as a sum of consecutive naturals, for example, 298794 + ... + 299256.

It is an arithmetic number, because the mean of its divisors is an integer number (5322080).

Almost surely, 2^138448575 is an apocalyptic number.

138448575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138448575 is a deficient number, since it is larger than the sum of its proper divisors (117011265).

138448575 is a wasteful number, since it uses less digits than its factorization.

138448575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 914 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 138448575 is about 11766.4172542027. The cubic root of 138448575 is about 517.3242419315.

The spelling of 138448575 in words is "one hundred thirty-eight million, four hundred forty-eight thousand, five hundred seventy-five".