138317502 has 16 divisors (see below), whose sum is σ = 276755472. Its totient is φ = 46085760.

The previous prime is 138317497. The next prime is 138317513. The reversal of 138317502 is 205713831.

138317502 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 138317502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18102 + ... + 24582.

It is an arithmetic number, because the mean of its divisors is an integer number (17297217).

Almost surely, 2^138317502 is an apocalyptic number.

138317502 is an abundant number, since it is smaller than the sum of its proper divisors (138437970).

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

138317502 is a wasteful number, since it uses less digits than its factorization.

138317502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10043.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 138317502 is about 11760.8461430290. The cubic root of 138317502 is about 517.1609354476.

The spelling of 138317502 in words is "one hundred thirty-eight million, three hundred seventeen thousand, five hundred two".