385822509 has 8 divisors (see below), whose sum is σ = 515442720. Its totient is φ = 256708656.

The previous prime is 385822501. The next prime is 385822511. The reversal of 385822509 is 905228583.

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

It is not a de Polignac number, because 385822509 - 2³ = 385822501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385822501) 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, 124807 + ... + 127860.

It is an arithmetic number, because the mean of its divisors is an integer number (64430340).

Almost surely, 2^385822509 is an apocalyptic number.

It is an amenable number.

385822509 is a deficient number, since it is larger than the sum of its proper divisors (129620211).

385822509 is a wasteful number, since it uses less digits than its factorization.

385822509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253179.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 385822509 is about 19642.3651579946. The cubic root of 385822509 is about 727.9963250277.

The spelling of 385822509 in words is "three hundred eighty-five million, eight hundred twenty-two thousand, five hundred nine".