384449281 has 4 divisors (see below), whose sum is σ = 385557552. Its totient is φ = 383341012.

The previous prime is 384449269. The next prime is 384449291. The reversal of 384449281 is 182944483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 384449281 - 2⁹ = 384448769 is a prime.

It is a super-2 number, since 2×384449281² = 295602499322833922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384449291) 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, 553615 + ... + 554308.

It is an arithmetic number, because the mean of its divisors is an integer number (96389388).

Almost surely, 2^384449281 is an apocalyptic number.

It is an amenable number.

384449281 is a deficient number, since it is larger than the sum of its proper divisors (1108271).

384449281 is a wasteful number, since it uses less digits than its factorization.

384449281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108270.

The product of its digits is 221184, while the sum is 43.

The square root of 384449281 is about 19607.3782286159. The cubic root of 384449281 is about 727.1315980940.

The spelling of 384449281 in words is "three hundred eighty-four million, four hundred forty-nine thousand, two hundred eighty-one".