385336931 has 6 divisors (see below), whose sum is σ = 448249140. Its totient is φ = 330288756.

The previous prime is 385336927. The next prime is 385336993. The reversal of 385336931 is 139633583.

It is not a de Polignac number, because 385336931 - 2² = 385336927 is a prime.

It is a super-2 number, since 2×385336931² = 296969100784997522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385335931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3931961 + ... + 3932058.

It is an arithmetic number, because the mean of its divisors is an integer number (74708190).

Almost surely, 2^385336931 is an apocalyptic number.

385336931 is a deficient number, since it is larger than the sum of its proper divisors (62912209).

385336931 is an equidigital number, since it uses as much as digits as its factorization.

385336931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864033 (or 7864026 counting only the distinct ones).

The product of its digits is 174960, while the sum is 41.

The square root of 385336931 is about 19630.0007896077. Note that the first 3 decimals coincide. The cubic root of 385336931 is about 727.6907895426.

The spelling of 385336931 in words is "three hundred eighty-five million, three hundred thirty-six thousand, nine hundred thirty-one".