385416891 has 24 divisors (see below), whose sum is σ = 565153680. Its totient is φ = 253069056.

The previous prime is 385416883. The next prime is 385416929. The reversal of 385416891 is 198614583.

It is not a de Polignac number, because 385416891 - 2³ = 385416883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385416791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340815 + ... + 341943.

It is an arithmetic number, because the mean of its divisors is an integer number (23548070).

Almost surely, 2^385416891 is an apocalyptic number.

385416891 is a deficient number, since it is larger than the sum of its proper divisors (179736789).

385416891 is a wasteful number, since it uses less digits than its factorization.

385416891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1672 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 385416891 is about 19632.0373624339. The cubic root of 385416891 is about 727.7411196362.

The spelling of 385416891 in words is "three hundred eighty-five million, four hundred sixteen thousand, eight hundred ninety-one".