304040431 has 4 divisors (see below), whose sum is σ = 304665232. Its totient is φ = 303415632.

The previous prime is 304040423. The next prime is 304040441. The reversal of 304040431 is 134040403.

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 304040431 - 2³ = 304040423 is a prime.

It is a super-2 number, since 2×304040431² = 184881167365331522, 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 = 304040399 and 304040408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304040411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311670 + ... + 312643.

It is an arithmetic number, because the mean of its divisors is an integer number (76166308).

Almost surely, 2^304040431 is an apocalyptic number.

304040431 is a deficient number, since it is larger than the sum of its proper divisors (624801).

304040431 is an equidigital number, since it uses as much as digits as its factorization.

304040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624800.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 304040431 is about 17436.7551740569. The cubic root of 304040431 is about 672.4248888164.

Adding to 304040431 its reverse (134040403), we get a palindrome (438080834).

The spelling of 304040431 in words is "three hundred four million, forty thousand, four hundred thirty-one".