404869 has 8 divisors (see below), whose sum is σ = 437760. Its totient is φ = 373296.

The previous prime is 404851. The next prime is 404941. The reversal of 404869 is 968404.

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 404869 - 2⁵ = 404837 is a prime.

It is a super-2 number, since 2×404869² = 327837814322, which contains 22 as substring.

It is a Duffinian number.

404869 is a lucky number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 404869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404819) 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, 364 + ... + 970.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁴⁰⁴⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

404869 is a deficient number, since it is larger than the sum of its proper divisors (32891).

404869 is a wasteful number, since it uses less digits than its factorization.

404869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 404869 is about 636.2931714234. The cubic root of 404869 is about 73.9783842393.

The spelling of 404869 in words is "four hundred four thousand, eight hundred sixty-nine".