138924168 has 32 divisors (see below), whose sum is σ = 347854560. Its totient is φ = 46235520.

The previous prime is 138924167. The next prime is 138924169. The reversal of 138924168 is 861429831.

It is an interprime number because it is at equal distance from previous prime (138924167) and next prime (138924169).

It is not an unprimeable number, because it can be changed into a prime (138924161) 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, 12396 + ... + 20772.

It is an arithmetic number, because the mean of its divisors is an integer number (10870455).

Almost surely, 2^138924168 is an apocalyptic number.

It is an amenable number.

138924168 is an abundant number, since it is smaller than the sum of its proper divisors (208930392).

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

138924168 is a wasteful number, since it uses less digits than its factorization.

138924168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077 (or 9073 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 138924168 is about 11786.6096906617. The cubic root of 138924168 is about 517.9159287739.

The spelling of 138924168 in words is "one hundred thirty-eight million, nine hundred twenty-four thousand, one hundred sixty-eight".