138516824 has 8 divisors (see below), whose sum is σ = 259719060. Its totient is φ = 69258408.

The previous prime is 138516817. The next prime is 138516827. The reversal of 138516824 is 428615831.

138516824 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138516827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8657294 + ... + 8657309.

Almost surely, 2^138516824 is an apocalyptic number.

It is an amenable number.

138516824 is a deficient number, since it is larger than the sum of its proper divisors (121202236).

138516824 is a wasteful number, since it uses less digits than its factorization.

138516824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314609 (or 17314605 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 138516824 is about 11769.3170575017. The cubic root of 138516824 is about 517.4092339275.

The spelling of 138516824 in words is "one hundred thirty-eight million, five hundred sixteen thousand, eight hundred twenty-four".