380809509 has 8 divisors (see below), whose sum is σ = 508640640. Its totient is φ = 253425696.

The previous prime is 380809489. The next prime is 380809523. The reversal of 380809509 is 905908083.

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

It is not a de Polignac number, because 380809509 - 2¹¹ = 380807461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380809589) 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, 109837 + ... + 113250.

It is an arithmetic number, because the mean of its divisors is an integer number (63580080).

Almost surely, 2^380809509 is an apocalyptic number.

It is an amenable number.

380809509 is a deficient number, since it is larger than the sum of its proper divisors (127831131).

380809509 is a wasteful number, since it uses less digits than its factorization.

380809509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223659.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 380809509 is about 19514.3411110906. The cubic root of 380809509 is about 724.8296129122.

The spelling of 380809509 in words is "three hundred eighty million, eight hundred nine thousand, five hundred nine".