385193857 has 4 divisors (see below), whose sum is σ = 401941440. Its totient is φ = 368446276.

The previous prime is 385193843. The next prime is 385193873. The reversal of 385193857 is 758391583.

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, and also an emirpimes, since its reverse is a distinct semiprime: 758391583 = 829 ⋅914827.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385193857 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385193857.

It is not an unprimeable number, because it can be changed into a prime (385193827) 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, 8373757 + ... + 8373802.

It is an arithmetic number, because the mean of its divisors is an integer number (100485360).

Almost surely, 2^385193857 is an apocalyptic number.

It is an amenable number.

385193857 is a deficient number, since it is larger than the sum of its proper divisors (16747583).

385193857 is a wasteful number, since it uses less digits than its factorization.

385193857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747582.

The product of its digits is 907200, while the sum is 49.

The square root of 385193857 is about 19626.3561824400. The cubic root of 385193857 is about 727.6007155390.

The spelling of 385193857 in words is "three hundred eighty-five million, one hundred ninety-three thousand, eight hundred fifty-seven".