138368724 has 24 divisors (see below), whose sum is σ = 347696160. Its totient is φ = 42574944.

The previous prime is 138368723. The next prime is 138368753. The reversal of 138368724 is 427863831.

138368724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138368723) 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, 443334 + ... + 443645.

It is an arithmetic number, because the mean of its divisors is an integer number (14487340).

Almost surely, 2^138368724 is an apocalyptic number.

It is an amenable number.

138368724 is an abundant number, since it is smaller than the sum of its proper divisors (209327436).

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

138368724 is a wasteful number, since it uses less digits than its factorization.

138368724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886999 (or 886997 counting only the distinct ones).

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

The square root of 138368724 is about 11763.0235908970. The cubic root of 138368724 is about 517.2247662422.

It can be divided in two parts, 1383 and 68724, that added together give a palindrome (70107).

The spelling of 138368724 in words is "one hundred thirty-eight million, three hundred sixty-eight thousand, seven hundred twenty-four".