138670326 has 32 divisors (see below), whose sum is σ = 326285280. Its totient is φ = 43504128.

The previous prime is 138670319. The next prime is 138670333. The reversal of 138670326 is 623076831.

It is a happy number.

138670326 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138670319) and next prime (138670333).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74611 + ... + 76446.

It is an arithmetic number, because the mean of its divisors is an integer number (10196415).

Almost surely, 2^138670326 is an apocalyptic number.

138670326 is an abundant number, since it is smaller than the sum of its proper divisors (187614954).

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

138670326 is a wasteful number, since it uses less digits than its factorization.

138670326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151085 (or 151079 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 138670326 is about 11775.8365307947. The cubic root of 138670326 is about 517.6002914213.

The spelling of 138670326 in words is "one hundred thirty-eight million, six hundred seventy thousand, three hundred twenty-six".