38644647 has 8 divisors (see below), whose sum is σ = 51558144. Its totient is φ = 25747128.

The previous prime is 38644633. The next prime is 38644699. The reversal of 38644647 is 74644683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38644647 - 2¹⁰ = 38643623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38644599 and 38644608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38644147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3858 + ... + 9600.

It is an arithmetic number, because the mean of its divisors is an integer number (6444768).

Almost surely, 2^38644647 is an apocalyptic number.

38644647 is a deficient number, since it is larger than the sum of its proper divisors (12913497).

38644647 is a wasteful number, since it uses less digits than its factorization.

38644647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989.

The product of its digits is 387072, while the sum is 42.

The square root of 38644647 is about 6216.4818828659. The cubic root of 38644647 is about 338.0880196287.

The spelling of 38644647 in words is "thirty-eight million, six hundred forty-four thousand, six hundred forty-seven".