38893807909 has 12 divisors (see below), whose sum is σ = 42968081772. Its totient is φ = 35178503360.

The previous prime is 38893807903. The next prime is 38893807933. The reversal of 38893807909 is 90970839883.

It can be written as a sum of positive squares in 2 ways, for example, as 38359181025 + 534626884 = 195855^2 + 23122^2 .

It is not a de Polignac number, because 38893807909 - 2¹³ = 38893799717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38893807903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 791992 + ... + 839665.

It is an arithmetic number, because the mean of its divisors is an integer number (3580673481).

Almost surely, 2^38893807909 is an apocalyptic number.

It is an amenable number.

38893807909 is a deficient number, since it is larger than the sum of its proper divisors (4074273863).

38893807909 is a wasteful number, since it uses less digits than its factorization.

38893807909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631876 (or 1631865 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 64.

The spelling of 38893807909 in words is "thirty-eight billion, eight hundred ninety-three million, eight hundred seven thousand, nine hundred nine".