385115817 has 4 divisors (see below), whose sum is σ = 513487760. Its totient is φ = 256743876.

The previous prime is 385115803. The next prime is 385115851. The reversal of 385115817 is 718511583.

It is a happy number.

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 not a de Polignac number, because 385115817 - 2⁸ = 385115561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385115417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64185967 + ... + 64185972.

It is an arithmetic number, because the mean of its divisors is an integer number (128371940).

Almost surely, 2^385115817 is an apocalyptic number.

It is an amenable number.

385115817 is a deficient number, since it is larger than the sum of its proper divisors (128371943).

385115817 is a wasteful number, since it uses less digits than its factorization.

385115817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128371942.

The product of its digits is 33600, while the sum is 39.

The square root of 385115817 is about 19624.3679388662. The cubic root of 385115817 is about 727.5515750920.

The spelling of 385115817 in words is "three hundred eighty-five million, one hundred fifteen thousand, eight hundred seventeen".