38885731993 has 16 divisors (see below), whose sum is σ = 39505890240. Its totient is φ = 38270104576.

The previous prime is 38885731979. The next prime is 38885732009. The reversal of 38885731993 is 39913758883.

It is a cyclic number.

It is not a de Polignac number, because 38885731993 - 2²⁹ = 38348861081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38885731933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29751246 + ... + 29752552.

It is an arithmetic number, because the mean of its divisors is an integer number (2469118140).

Almost surely, 2^38885731993 is an apocalyptic number.

It is an amenable number.

38885731993 is a deficient number, since it is larger than the sum of its proper divisors (620158247).

38885731993 is a wasteful number, since it uses less digits than its factorization.

38885731993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696.

The product of its digits is 39191040, while the sum is 64.

The spelling of 38885731993 in words is "thirty-eight billion, eight hundred eighty-five million, seven hundred thirty-one thousand, nine hundred ninety-three".