138445026 has 8 divisors (see below), whose sum is σ = 276890064. Its totient is φ = 46148340.

The previous prime is 138445007. The next prime is 138445037. The reversal of 138445026 is 620544831.

It is a sphenic number, since it is the product of 3 distinct primes.

138445026 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11537080 + ... + 11537091.

It is an arithmetic number, because the mean of its divisors is an integer number (34611258).

Almost surely, 2^138445026 is an apocalyptic number.

138445026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138445026 is a wasteful number, since it uses less digits than its factorization.

138445026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23074176.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 138445026 is about 11766.2664426742. The cubic root of 138445026 is about 517.3198215190.

Adding to 138445026 its reverse (620544831), we get a palindrome (758989857).

The spelling of 138445026 in words is "one hundred thirty-eight million, four hundred forty-five thousand, twenty-six".