138326412 has 60 divisors (see below), whose sum is σ = 376611256. Its totient is φ = 39513600.

The previous prime is 138326411. The next prime is 138326413. The reversal of 138326412 is 214623831.

It is an interprime number because it is at equal distance from previous prime (138326411) and next prime (138326413).

It is a self number, because there is not a number n which added to its sum of digits gives 138326412.

It is not an unprimeable number, because it can be changed into a prime (138326411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26412 + ... + 31212.

Almost surely, 2^138326412 is an apocalyptic number.

138326412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138326412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188305628).

138326412 is an abundant number, since it is smaller than the sum of its proper divisors (238284844).

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

138326412 is an equidigital number, since it uses as much as digits as its factorization.

138326412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836 (or 4813 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 138326412 is about 11761.2249362046. The cubic root of 138326412 is about 517.1720398630.

The spelling of 138326412 in words is "one hundred thirty-eight million, three hundred twenty-six thousand, four hundred twelve".