38356809 has 4 divisors (see below), whose sum is σ = 51142416. Its totient is φ = 25571204.

The previous prime is 38356793. The next prime is 38356819. The reversal of 38356809 is 90865383.

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.

It is a cyclic number.

It is not a de Polignac number, because 38356809 - 2⁴ = 38356793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38356819) 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, 6392799 + ... + 6392804.

It is an arithmetic number, because the mean of its divisors is an integer number (12785604).

Almost surely, 2^38356809 is an apocalyptic number.

It is an amenable number.

38356809 is a deficient number, since it is larger than the sum of its proper divisors (12785607).

38356809 is a wasteful number, since it uses less digits than its factorization.

38356809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12785606.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 38356809 is about 6193.2874146127. The cubic root of 38356809 is about 337.2465301252.

The spelling of 38356809 in words is "thirty-eight million, three hundred fifty-six thousand, eight hundred nine".