38999943 has 6 divisors (see below), whose sum is σ = 56333264. Its totient is φ = 25999956.

The previous prime is 38999911. The next prime is 38999959. The reversal of 38999943 is 34999983.

38999943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38999943 - 2⁵ = 38999911 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 38999943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38999903) 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 5 ways as a sum of consecutive naturals, for example, 2166655 + ... + 2166672.

Almost surely, 2^38999943 is an apocalyptic number.

38999943 is a deficient number, since it is larger than the sum of its proper divisors (17333321).

38999943 is a wasteful number, since it uses less digits than its factorization.

38999943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333333 (or 4333330 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 38999943 is about 6244.9934347443. The cubic root of 38999943 is about 339.1209790885.

The spelling of 38999943 in words is "thirty-eight million, nine hundred ninety-nine thousand, nine hundred forty-three".