384893881 has 4 divisors (see below), whose sum is σ = 385102564. Its totient is φ = 384685200.

The previous prime is 384893843. The next prime is 384893893. The reversal of 384893881 is 188398483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53071225 + 331822656 = 7285^2 + 18216^2 .

It is a cyclic number.

It is not a de Polignac number, because 384893881 - 2¹⁷ = 384762809 is a prime.

It is a super-2 number, since 2×384893881² = 296286599262484322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384893081) 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, 101550 + ... + 105271.

It is an arithmetic number, because the mean of its divisors is an integer number (96275641).

Almost surely, 2^384893881 is an apocalyptic number.

It is an amenable number.

384893881 is a deficient number, since it is larger than the sum of its proper divisors (208683).

384893881 is a wasteful number, since it uses less digits than its factorization.

384893881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208682.

The product of its digits is 1327104, while the sum is 52.

The square root of 384893881 is about 19618.7125214679. The cubic root of 384893881 is about 727.4117895118.

The spelling of 384893881 in words is "three hundred eighty-four million, eight hundred ninety-three thousand, eight hundred eighty-one".