404644505 has 16 divisors (see below), whose sum is σ = 494230464. Its totient is φ = 317989440.

The previous prime is 404644441. The next prime is 404644531. The reversal of 404644505 is 505446404.

It is not a de Polignac number, because 404644505 - 2⁶ = 404644441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 72422 + ... + 77808.

It is an arithmetic number, because the mean of its divisors is an integer number (30889404).

Almost surely, 2^404644505 is an apocalyptic number.

It is an amenable number.

404644505 is a deficient number, since it is larger than the sum of its proper divisors (89585959).

404644505 is a wasteful number, since it uses less digits than its factorization.

404644505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 404644505 is about 20115.7775141803. Note that the first 3 decimals coincide. The cubic root of 404644505 is about 739.6470833593.

The spelling of 404644505 in words is "four hundred four million, six hundred forty-four thousand, five hundred five".