404643253 has 8 divisors (see below), whose sum is σ = 462702080. Its totient is φ = 346647600.

The previous prime is 404643223. The next prime is 404643259. The reversal of 404643253 is 352346404.

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

It is a cyclic number.

It is not a de Polignac number, because 404643253 - 2¹⁷ = 404512181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404643259) 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, 1158 + ... + 28471.

It is an arithmetic number, because the mean of its divisors is an integer number (57837760).

Almost surely, 2^404643253 is an apocalyptic number.

It is an amenable number.

404643253 is a deficient number, since it is larger than the sum of its proper divisors (58058827).

404643253 is a wasteful number, since it uses less digits than its factorization.

404643253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31587.

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 404643253 is about 20115.7463943051. The cubic root of 404643253 is about 739.6463205176.

Adding to 404643253 its reverse (352346404), we get a palindrome (756989657).

The spelling of 404643253 in words is "four hundred four million, six hundred forty-three thousand, two hundred fifty-three".