384891 has 16 divisors (see below), whose sum is σ = 564480. Its totient is φ = 231840.

The previous prime is 384889. The next prime is 384907. The reversal of 384891 is 198483.

It is not a de Polignac number, because 384891 - 2¹ = 384889 is a prime.

384891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (384821) 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, 2700 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2³⁸⁴⁸⁹¹ is an apocalyptic number.

384891 is a deficient number, since it is larger than the sum of its proper divisors (179589).

384891 is a wasteful number, since it uses less digits than its factorization.

384891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 6912, while the sum is 33.

The square root of 384891 is about 620.3958413787. The cubic root of 384891 is about 72.7409974571.

It can be divided in two parts, 384 and 891, that added together give a triangular number (1275 = T₅₀).

The spelling of 384891 in words is "three hundred eighty-four thousand, eight hundred ninety-one".