138353864 has 16 divisors (see below), whose sum is σ = 282996720. Its totient is φ = 62888080.

The previous prime is 138353863. The next prime is 138353893. The reversal of 138353864 is 468353831.

It is not an unprimeable number, because it can be changed into a prime (138353863) 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 3 ways as a sum of consecutive naturals, for example, 786014 + ... + 786189.

It is an arithmetic number, because the mean of its divisors is an integer number (17687295).

Almost surely, 2^138353864 is an apocalyptic number.

It is an amenable number.

138353864 is an abundant number, since it is smaller than the sum of its proper divisors (144642856).

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

138353864 is a wasteful number, since it uses less digits than its factorization.

138353864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572220 (or 1572216 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 138353864 is about 11762.3919336162. The cubic root of 138353864 is about 517.2062499307.

The spelling of 138353864 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, eight hundred sixty-four".