138783585 has 16 divisors (see below), whose sum is σ = 225097344. Its totient is φ = 73003392.

The previous prime is 138783583. The next prime is 138783607. The reversal of 138783585 is 585387831.

It is a happy number.

It is not a de Polignac number, because 138783585 - 2¹ = 138783583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138783583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62277 + ... + 64466.

It is an arithmetic number, because the mean of its divisors is an integer number (14068584).

Almost surely, 2^138783585 is an apocalyptic number.

138783585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138783585 is a deficient number, since it is larger than the sum of its proper divisors (86313759).

138783585 is a wasteful number, since it uses less digits than its factorization.

138783585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126824.

The product of its digits is 806400, while the sum is 48.

The square root of 138783585 is about 11780.6445069869. The cubic root of 138783585 is about 517.7411697675.

The spelling of 138783585 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, five hundred eighty-five".