138592212 has 24 divisors (see below), whose sum is σ = 352780512. Its totient is φ = 41997600.

The previous prime is 138592199. The next prime is 138592219. The reversal of 138592212 is 212295831.

It is a happy number.

138592212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138592219) 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, 524839 + ... + 525102.

It is an arithmetic number, because the mean of its divisors is an integer number (14699188).

Almost surely, 2^138592212 is an apocalyptic number.

138592212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138592212 is an abundant number, since it is smaller than the sum of its proper divisors (214188300).

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

138592212 is a wasteful number, since it uses less digits than its factorization.

138592212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049959 (or 1049957 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 138592212 is about 11772.5193565354. The cubic root of 138592212 is about 517.5030838342.

The spelling of 138592212 in words is "one hundred thirty-eight million, five hundred ninety-two thousand, two hundred twelve".