138445104 has 40 divisors (see below), whose sum is σ = 408743680. Its totient is φ = 39555648.

The previous prime is 138445067. The next prime is 138445147. The reversal of 138445104 is 401544831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205684 + ... + 206355.

It is an arithmetic number, because the mean of its divisors is an integer number (10218592).

Almost surely, 2^138445104 is an apocalyptic number.

138445104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138445104 is an abundant number, since it is smaller than the sum of its proper divisors (270298576).

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

138445104 is a wasteful number, since it uses less digits than its factorization.

138445104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412057 (or 412051 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 138445104 is about 11766.2697572340. The cubic root of 138445104 is about 517.3199186718.

Adding to 138445104 its reverse (401544831), we get a palindrome (539989935).

The spelling of 138445104 in words is "one hundred thirty-eight million, four hundred forty-five thousand, one hundred four".