385329987 has 16 divisors (see below), whose sum is σ = 652410880. Its totient is φ = 220188456.

The previous prime is 385329983. The next prime is 385330021. The reversal of 385329987 is 789923583.

It is a happy number.

It is not a de Polignac number, because 385329987 - 2² = 385329983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385329983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019203 + ... + 1019580.

It is an arithmetic number, because the mean of its divisors is an integer number (40775680).

Almost surely, 2^385329987 is an apocalyptic number.

385329987 is a deficient number, since it is larger than the sum of its proper divisors (267080893).

385329987 is a wasteful number, since it uses less digits than its factorization.

385329987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038799 (or 2038793 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 385329987 is about 19629.8239166835. The cubic root of 385329987 is about 727.6864183765.

The spelling of 385329987 in words is "three hundred eighty-five million, three hundred twenty-nine thousand, nine hundred eighty-seven".