385840313 has 4 divisors (see below), whose sum is σ = 408536820. Its totient is φ = 363143808.

The previous prime is 385840309. The next prime is 385840321. The reversal of 385840313 is 313048583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141324544 + 244515769 = 11888^2 + 15637^2 .

It is a cyclic number.

It is not a de Polignac number, because 385840313 - 2² = 385840309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385840613) 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, 11348228 + ... + 11348261.

It is an arithmetic number, because the mean of its divisors is an integer number (102134205).

Almost surely, 2^385840313 is an apocalyptic number.

It is an amenable number.

385840313 is a deficient number, since it is larger than the sum of its proper divisors (22696507).

385840313 is a wasteful number, since it uses less digits than its factorization.

385840313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22696506.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 385840313 is about 19642.8183568448. The cubic root of 385840313 is about 728.0075227909.

Adding to 385840313 its reverse (313048583), we get a palindrome (698888896).

The spelling of 385840313 in words is "three hundred eighty-five million, eight hundred forty thousand, three hundred thirteen".