38931800893 has 16 divisors (see below), whose sum is σ = 40251628080. Its totient is φ = 37634747904.

The previous prime is 38931800849. The next prime is 38931800899. The reversal of 38931800893 is 39800813983.

It can be written as a sum of positive squares in 8 ways, for example, as 9086474329 + 29845326564 = 95323^2 + 172758^2 .

It is a cyclic number.

It is not a de Polignac number, because 38931800893 - 2⁹ = 38931800381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38931800893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38931800899) 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 15 ways as a sum of consecutive naturals, for example, 4131255 + ... + 4140667.

It is an arithmetic number, because the mean of its divisors is an integer number (2515726755).

Almost surely, 2^38931800893 is an apocalyptic number.

It is an amenable number.

38931800893 is a deficient number, since it is larger than the sum of its proper divisors (1319827187).

38931800893 is a wasteful number, since it uses less digits than its factorization.

38931800893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10608.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 38931800893 in words is "thirty-eight billion, nine hundred thirty-one million, eight hundred thousand, eight hundred ninety-three".