384399491 has 8 divisors (see below), whose sum is σ = 446516064. Its totient is φ = 324083520.

The previous prime is 384399443. The next prime is 384399527. The reversal of 384399491 is 194993483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 384399491 - 2¹⁰ = 384398467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384399791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449690 + ... + 450543.

It is an arithmetic number, because the mean of its divisors is an integer number (55814508).

Almost surely, 2^384399491 is an apocalyptic number.

384399491 is a deficient number, since it is larger than the sum of its proper divisors (62116573).

384399491 is an equidigital number, since it uses as much as digits as its factorization.

384399491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900301.

The product of its digits is 839808, while the sum is 50.

The square root of 384399491 is about 19606.1085123999. The cubic root of 384399491 is about 727.1002064843.

The spelling of 384399491 in words is "three hundred eighty-four million, three hundred ninety-nine thousand, four hundred ninety-one".