38639943 has 16 divisors (see below), whose sum is σ = 57349600. Its totient is φ = 25712640.

The previous prime is 38639933. The next prime is 38639987. The reversal of 38639943 is 34993683.

38639943 is a `hidden beast` number, since 3 + 8 + 639 + 9 + 4 + 3 = 666.

38639943 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 38639943 - 2¹⁸ = 38377799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38639933) 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, 19833 + ... + 21693.

It is an arithmetic number, because the mean of its divisors is an integer number (3584350).

Almost surely, 2^38639943 is an apocalyptic number.

38639943 is a deficient number, since it is larger than the sum of its proper divisors (18709657).

38639943 is a wasteful number, since it uses less digits than its factorization.

38639943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639 (or 2633 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 38639943 is about 6216.1035223040. The cubic root of 38639943 is about 338.0743012080.

The spelling of 38639943 in words is "thirty-eight million, six hundred thirty-nine thousand, nine hundred forty-three".