138467508 has 12 divisors (see below), whose sum is σ = 323090880. Its totient is φ = 46155832.

The previous prime is 138467507. The next prime is 138467509. The reversal of 138467508 is 805764831.

It is an interprime number because it is at equal distance from previous prime (138467507) and next prime (138467509).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 138467508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138467507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5769468 + ... + 5769491.

It is an arithmetic number, because the mean of its divisors is an integer number (26924240).

Almost surely, 2^138467508 is an apocalyptic number.

It is an amenable number.

138467508 is an abundant number, since it is smaller than the sum of its proper divisors (184623372).

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

138467508 is a wasteful number, since it uses less digits than its factorization.

138467508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11538966 (or 11538964 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 138467508 is about 11767.2217621663. The cubic root of 138467508 is about 517.3478224160.

The spelling of 138467508 in words is "one hundred thirty-eight million, four hundred sixty-seven thousand, five hundred eight".