38565409 has 4 divisors (see below), whose sum is σ = 39219120. Its totient is φ = 37911700.

The previous prime is 38565407. The next prime is 38565413. The reversal of 38565409 is 90456583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90456583 = 7 ⋅12922369.

It is a cyclic number.

It is not a de Polignac number, because 38565409 - 2¹ = 38565407 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38565407) 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, 326767 + ... + 326884.

It is an arithmetic number, because the mean of its divisors is an integer number (9804780).

Almost surely, 2^38565409 is an apocalyptic number.

It is an amenable number.

38565409 is a deficient number, since it is larger than the sum of its proper divisors (653711).

38565409 is an equidigital number, since it uses as much as digits as its factorization.

38565409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653710.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 38565409 is about 6210.1053936306. The cubic root of 38565409 is about 337.8567866605.

The spelling of 38565409 in words is "thirty-eight million, five hundred sixty-five thousand, four hundred nine".