384289431 has 4 divisors (see below), whose sum is σ = 512385912. Its totient is φ = 256192952.

The previous prime is 384289397. The next prime is 384289439. The reversal of 384289431 is 134982483.

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

It is a cyclic number.

It is not a de Polignac number, because 384289431 - 2⁷ = 384289303 is a prime.

It is a super-2 number, since 2×384289431² = 295356733556607522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384289439) 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, 64048236 + ... + 64048241.

It is an arithmetic number, because the mean of its divisors is an integer number (128096478).

Almost surely, 2^384289431 is an apocalyptic number.

384289431 is a deficient number, since it is larger than the sum of its proper divisors (128096481).

384289431 is a wasteful number, since it uses less digits than its factorization.

384289431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128096480.

The product of its digits is 165888, while the sum is 42.

The square root of 384289431 is about 19603.3015331602. The cubic root of 384289431 is about 727.0308062126.

The spelling of 384289431 in words is "three hundred eighty-four million, two hundred eighty-nine thousand, four hundred thirty-one".