38544809 has 4 divisors (see below), whose sum is σ = 38584020. Its totient is φ = 38505600.

The previous prime is 38544791. The next prime is 38544829. The reversal of 38544809 is 90844583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13344409 + 25200400 = 3653^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 38544809 - 2⁸ = 38544553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38544829) 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, 18092 + ... + 20109.

It is an arithmetic number, because the mean of its divisors is an integer number (9646005).

Almost surely, 2^38544809 is an apocalyptic number.

It is an amenable number.

38544809 is a deficient number, since it is larger than the sum of its proper divisors (39211).

38544809 is a wasteful number, since it uses less digits than its factorization.

38544809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39210.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 38544809 is about 6208.4465850968. The cubic root of 38544809 is about 337.7966197081.

The spelling of 38544809 in words is "thirty-eight million, five hundred forty-four thousand, eight hundred nine".