138547212 has 24 divisors (see below), whose sum is σ = 342293616. Its totient is φ = 43465728.

The previous prime is 138547177. The next prime is 138547217. The reversal of 138547212 is 212745831.

It is not an unprimeable number, because it can be changed into a prime (138547217) 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, 339373 + ... + 339780.

It is an arithmetic number, because the mean of its divisors is an integer number (14262234).

Almost surely, 2^138547212 is an apocalyptic number.

138547212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138547212 is an abundant number, since it is smaller than the sum of its proper divisors (203746404).

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

138547212 is a wasteful number, since it uses less digits than its factorization.

138547212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679177 (or 679175 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 138547212 is about 11770.6079707040. The cubic root of 138547212 is about 517.4470677966.

The spelling of 138547212 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, two hundred twelve".