38000805391 has 4 divisors (see below), whose sum is σ = 40000847800. Its totient is φ = 36000762984.

The previous prime is 38000805389. The next prime is 38000805397. The reversal of 38000805391 is 19350800083.

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

It is a cyclic number.

It is not a de Polignac number, because 38000805391 - 2¹ = 38000805389 is a prime.

It is a super-2 number, since 2×38000805391² (a number of 22 digits) contains 22 as substring.

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 38000805391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38000805397) 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, 1000021176 + ... + 1000021213.

It is an arithmetic number, because the mean of its divisors is an integer number (10000211950).

Almost surely, 2^38000805391 is an apocalyptic number.

38000805391 is a deficient number, since it is larger than the sum of its proper divisors (2000042409).

38000805391 is a wasteful number, since it uses less digits than its factorization.

38000805391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000042408.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 38000805391 in words is "thirty-eight billion, eight hundred five thousand, three hundred ninety-one".