138565208 has 24 divisors (see below), whose sum is σ = 262422300. Its totient is φ = 68589312.

The previous prime is 138565201. The next prime is 138565211. The reversal of 138565208 is 802565831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138565201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392360 + ... + 392712.

Almost surely, 2^138565208 is an apocalyptic number.

It is an amenable number.

138565208 is a deficient number, since it is larger than the sum of its proper divisors (123857092).

138565208 is an equidigital number, since it uses as much as digits as its factorization.

138565208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 138565208 is about 11771.3723923763. The cubic root of 138565208 is about 517.4694706877.

The spelling of 138565208 in words is "one hundred thirty-eight million, five hundred sixty-five thousand, two hundred eight".