385308643 has 4 divisors (see below), whose sum is σ = 388718568. Its totient is φ = 381898720.

The previous prime is 385308589. The next prime is 385308647. The reversal of 385308643 is 346803583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346803583 = 7 ⋅49543369.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385308643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 385308596 and 385308605.

It is not an unprimeable number, because it can be changed into a prime (385308647) 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, 1704793 + ... + 1705018.

It is an arithmetic number, because the mean of its divisors is an integer number (97179642).

Almost surely, 2^385308643 is an apocalyptic number.

385308643 is a deficient number, since it is larger than the sum of its proper divisors (3409925).

385308643 is a wasteful number, since it uses less digits than its factorization.

385308643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409924.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 385308643 is about 19629.2802466112. The cubic root of 385308643 is about 727.6729822515.

The spelling of 385308643 in words is "three hundred eighty-five million, three hundred eight thousand, six hundred forty-three".