404785019 has 8 divisors (see below), whose sum is σ = 410473920. Its totient is φ = 399174360.

The previous prime is 404784997. The next prime is 404785037. The reversal of 404785019 is 910587404.

It is a de Polignac number, because none of the positive numbers 2^k-404785019 is a prime.

It is a super-2 number, since 2×404785019² = 327701823213660722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404785099) 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 7 ways as a sum of consecutive naturals, for example, 492629 + ... + 493449.

It is an arithmetic number, because the mean of its divisors is an integer number (51309240).

Almost surely, 2^404785019 is an apocalyptic number.

404785019 is a deficient number, since it is larger than the sum of its proper divisors (5688901).

404785019 is an frugal number, since it uses more digits than its factorization.

404785019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 404785019 is about 20119.2698426161. The cubic root of 404785019 is about 739.7326883296.

The spelling of 404785019 in words is "four hundred four million, seven hundred eighty-five thousand, nineteen".