384197281 has 8 divisors (see below), whose sum is σ = 413992040. Its totient is φ = 354436992.

The previous prime is 384197269. The next prime is 384197287. The reversal of 384197281 is 182791483.

It can be written as a sum of positive squares in 4 ways, for example, as 45968400 + 338228881 = 6780^2 + 18391^2 .

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

It is not a de Polignac number, because 384197281 - 2⁷ = 384197153 is a prime.

It is a super-2 number, since 2×384197281² = 295215101455585922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384197287) 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, 17485 + ... + 32773.

It is an arithmetic number, because the mean of its divisors is an integer number (51749005).

Almost surely, 2^384197281 is an apocalyptic number.

It is an amenable number.

384197281 is a deficient number, since it is larger than the sum of its proper divisors (29794759).

384197281 is a wasteful number, since it uses less digits than its factorization.

384197281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17235.

The product of its digits is 96768, while the sum is 43.

The square root of 384197281 is about 19600.9510228458. The cubic root of 384197281 is about 726.9726892143.

The spelling of 384197281 in words is "three hundred eighty-four million, one hundred ninety-seven thousand, two hundred eighty-one".