384431 has 4 divisors (see below), whose sum is σ = 396864. Its totient is φ = 372000.

The previous prime is 384407. The next prime is 384437. The reversal of 384431 is 134483.

384431 = 96² + 97² + ... + 126².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134483 = 181 ⋅743.

It is not a de Polignac number, because 384431 - 2⁶ = 384367 is a prime.

It is a super-2 number, since 2×384431² = 295574387522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 384397 and 384406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384437) 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, 6170 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (99216).

2³⁸⁴⁴³¹ is an apocalyptic number.

384431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

384431 is a deficient number, since it is larger than the sum of its proper divisors (12433).

384431 is a wasteful number, since it uses less digits than its factorization.

384431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12432.

The product of its digits is 1152, while the sum is 23.

The square root of 384431 is about 620.0249994960. The cubic root of 384431 is about 72.7120072600.

Adding to 384431 its product of digits (1152), we get a palindrome (385583).

The spelling of 384431 in words is "three hundred eighty-four thousand, four hundred thirty-one".