38408707817 has 4 divisors (see below), whose sum is σ = 38410465620. Its totient is φ = 38406950016.

The previous prime is 38408707793. The next prime is 38408707819. The reversal of 38408707817 is 71870780483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71870780483 = 19 ⋅3782672657.

It can be written as a sum of positive squares in 2 ways, for example, as 34770687961 + 3638019856 = 186469^2 + 60316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38408707817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38408707819) 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, 845708 + ... + 889965.

It is an arithmetic number, because the mean of its divisors is an integer number (9602616405).

Almost surely, 2^38408707817 is an apocalyptic number.

It is an amenable number.

38408707817 is a deficient number, since it is larger than the sum of its proper divisors (1757803).

38408707817 is a wasteful number, since it uses less digits than its factorization.

38408707817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757802.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 38408707817 in words is "thirty-eight billion, four hundred eight million, seven hundred seven thousand, eight hundred seventeen".