805404369 has 64 divisors (see below), whose sum is σ = 1380943872. Its totient is φ = 405388800.

The previous prime is 805404349. The next prime is 805404371. The reversal of 805404369 is 963404508.

It is not a de Polignac number, because 805404369 - 2⁵ = 805404337 is a prime.

It is a super-2 number, since 2×805404369² = 1297352395208576322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (805404349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2623314 + ... + 2623620.

It is an arithmetic number, because the mean of its divisors is an integer number (21577248).

Almost surely, 2^805404369 is an apocalyptic number.

It is an amenable number.

805404369 is a deficient number, since it is larger than the sum of its proper divisors (575539503).

805404369 is a wasteful number, since it uses less digits than its factorization.

805404369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 805404369 is about 28379.6470908290. The cubic root of 805404369 is about 930.4034819936.

The spelling of 805404369 in words is "eight hundred five million, four hundred four thousand, three hundred sixty-nine".