138310445 has 48 divisors (see below), whose sum is σ = 209059200. Its totient is φ = 85992192.

The previous prime is 138310441. The next prime is 138310451. The reversal of 138310445 is 544013831.

It is not a de Polignac number, because 138310445 - 2² = 138310441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138310441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396131 + ... + 396479.

It is an arithmetic number, because the mean of its divisors is an integer number (4355400).

Almost surely, 2^138310445 is an apocalyptic number.

It is an amenable number.

138310445 is a deficient number, since it is larger than the sum of its proper divisors (70748755).

138310445 is a wasteful number, since it uses less digits than its factorization.

138310445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 138310445 is about 11760.5461182719. The cubic root of 138310445 is about 517.1521400633.

The spelling of 138310445 in words is "one hundred thirty-eight million, three hundred ten thousand, four hundred forty-five".