38620448309 has 4 divisors (see below), whose sum is σ = 40892239404. Its totient is φ = 36348657216.

The previous prime is 38620448291. The next prime is 38620448311. The reversal of 38620448309 is 90384402683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32057828209 + 6562620100 = 179047^2 + 81010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38620448309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38620448329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135895522 + ... + 1135895555.

It is an arithmetic number, because the mean of its divisors is an integer number (10223059851).

Almost surely, 2^38620448309 is an apocalyptic number.

It is an amenable number.

38620448309 is a deficient number, since it is larger than the sum of its proper divisors (2271791095).

38620448309 is a wasteful number, since it uses less digits than its factorization.

38620448309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271791094.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 38620448309 in words is "thirty-eight billion, six hundred twenty million, four hundred forty-eight thousand, three hundred nine".