384140399 has 4 divisors (see below), whose sum is σ = 384179880. Its totient is φ = 384100920.

The previous prime is 384140389. The next prime is 384140441. The reversal of 384140399 is 993041483.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 384140399 - 2²⁸ = 115704943 is a prime.

It is a super-2 number, since 2×384140399² = 295127692287758402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384140389) 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, 6344 + ... + 28434.

It is an arithmetic number, because the mean of its divisors is an integer number (96044970).

Almost surely, 2^384140399 is an apocalyptic number.

384140399 is a deficient number, since it is larger than the sum of its proper divisors (39481).

384140399 is a wasteful number, since it uses less digits than its factorization.

384140399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39480.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 384140399 is about 19599.4999681114. The cubic root of 384140399 is about 726.9368103369.

The spelling of 384140399 in words is "three hundred eighty-four million, one hundred forty thousand, three hundred ninety-nine".