384399505 has 8 divisors (see below), whose sum is σ = 527176512. Its totient is φ = 263588208.

The previous prime is 384399443. The next prime is 384399527. The reversal of 384399505 is 505993483.

It is a happy number.

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 384399505 - 2⁷ = 384399377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5491387 + ... + 5491456.

It is an arithmetic number, because the mean of its divisors is an integer number (65897064).

Almost surely, 2^384399505 is an apocalyptic number.

384399505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

384399505 is a deficient number, since it is larger than the sum of its proper divisors (142777007).

384399505 is a wasteful number, since it uses less digits than its factorization.

384399505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10982855.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 384399505 is about 19606.1088694315. The cubic root of 384399505 is about 727.1002153114.

The spelling of 384399505 in words is "three hundred eighty-four million, three hundred ninety-nine thousand, five hundred five".