38945838409 has 3 divisors (see below), whose sum is σ = 38946035757. Its totient is φ = 38945641062.

The previous prime is 38945838401. The next prime is 38945838413. The reversal of 38945838409 is 90483854983.

The square root of 38945838409 is 197347.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 38945838409 - 2³ = 38945838401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38945838401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 98674 + ... + 296020.

It is an arithmetic number, because the mean of its divisors is an integer number (12982011919).

Almost surely, 2^38945838409 is an apocalyptic number.

38945838409 is the 197347-th square number.

38945838409 is the 98674-th centered octagonal number.

It is an amenable number.

38945838409 is a deficient number, since it is larger than the sum of its proper divisors (197348).

38945838409 is an frugal number, since it uses more digits than its factorization.

38945838409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394694 (or 197347 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 38945838409 in words is "thirty-eight billion, nine hundred forty-five million, eight hundred thirty-eight thousand, four hundred nine".