385779505 has 8 divisors (see below), whose sum is σ = 463060224. Its totient is φ = 308540400.

The previous prime is 385779503. The next prime is 385779509. The reversal of 385779505 is 505977583.

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

It is not a de Polignac number, because 385779505 - 2¹ = 385779503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385779503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16170 + ... + 32140.

It is an arithmetic number, because the mean of its divisors is an integer number (57882528).

Almost surely, 2^385779505 is an apocalyptic number.

It is an amenable number.

385779505 is a deficient number, since it is larger than the sum of its proper divisors (77280719).

385779505 is a wasteful number, since it uses less digits than its factorization.

385779505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807.

The product of its (nonzero) digits is 1323000, while the sum is 49.

The square root of 385779505 is about 19641.2704527991. The cubic root of 385779505 is about 727.9692763923.

The spelling of 385779505 in words is "three hundred eighty-five million, seven hundred seventy-nine thousand, five hundred five".