138485757 has 16 divisors (see below), whose sum is σ = 200059200. Its totient is φ = 84870912.

The previous prime is 138485747. The next prime is 138485761. The reversal of 138485757 is 757584831.

It is a happy number.

It is not a de Polignac number, because 138485757 - 2¹⁰ = 138484733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138485747) 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, 29382 + ... + 33767.

It is an arithmetic number, because the mean of its divisors is an integer number (12503700).

Almost surely, 2^138485757 is an apocalyptic number.

138485757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138485757 is a deficient number, since it is larger than the sum of its proper divisors (61573443).

138485757 is a wasteful number, since it uses less digits than its factorization.

138485757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63212.

The product of its digits is 940800, while the sum is 48.

The square root of 138485757 is about 11767.9971532967. The cubic root of 138485757 is about 517.3705489647.

The spelling of 138485757 in words is "one hundred thirty-eight million, four hundred eighty-five thousand, seven hundred fifty-seven".