38929643 has 4 divisors (see below), whose sum is σ = 41219640. Its totient is φ = 36639648.

The previous prime is 38929633. The next prime is 38929669. The reversal of 38929643 is 34692983.

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 38929643 - 2¹⁰ = 38928619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38929594 and 38929603.

It is not an unprimeable number, because it can be changed into a prime (38929603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144973 + ... + 1145006.

It is an arithmetic number, because the mean of its divisors is an integer number (10304910).

Almost surely, 2^38929643 is an apocalyptic number.

38929643 is a deficient number, since it is larger than the sum of its proper divisors (2289997).

38929643 is a wasteful number, since it uses less digits than its factorization.

38929643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289996.

The product of its digits is 279936, while the sum is 44.

The square root of 38929643 is about 6239.3623872957. The cubic root of 38929643 is about 338.9170938015.

The spelling of 38929643 in words is "thirty-eight million, nine hundred twenty-nine thousand, six hundred forty-three".