405444804 has 12 divisors (see below), whose sum is σ = 946037904. Its totient is φ = 135148264.

The previous prime is 405444803. The next prime is 405444811. The reversal of 405444804 is 408444504.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (405444803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16893522 + ... + 16893545.

It is an arithmetic number, because the mean of its divisors is an integer number (78836492).

Almost surely, 2^405444804 is an apocalyptic number.

It is an amenable number.

405444804 is an abundant number, since it is smaller than the sum of its proper divisors (540593100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405444804 is a wasteful number, since it uses less digits than its factorization.

405444804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33787074 (or 33787072 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 33.

The square root of 405444804 is about 20135.6600090486. The cubic root of 405444804 is about 740.1343827047.

The spelling of 405444804 in words is "four hundred five million, four hundred forty-four thousand, eight hundred four".