138327864 has 32 divisors (see below), whose sum is σ = 346110720. Its totient is φ = 46070496.

The previous prime is 138327863. The next prime is 138327887. The reversal of 138327864 is 468723831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138327863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48609 + ... + 51375.

It is an arithmetic number, because the mean of its divisors is an integer number (10815960).

Almost surely, 2^138327864 is an apocalyptic number.

It is an amenable number.

138327864 is an abundant number, since it is smaller than the sum of its proper divisors (207782856).

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

138327864 is a wasteful number, since it uses less digits than its factorization.

138327864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4859 (or 4855 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 138327864 is about 11761.2866643068. The cubic root of 138327864 is about 517.1738494263.

The spelling of 138327864 in words is "one hundred thirty-eight million, three hundred twenty-seven thousand, eight hundred sixty-four".