408404866 has 16 divisors (see below), whose sum is σ = 616975128. Its totient is φ = 202752000.

The previous prime is 408404849. The next prime is 408404869. The reversal of 408404866 is 668404804.

It can be written as a sum of positive squares in 4 ways, for example, as 373842225 + 34562641 = 19335^2 + 5879^2 .

It is not an unprimeable number, because it can be changed into a prime (408404869) 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, 192226 + ... + 194338.

Almost surely, 2^408404866 is an apocalyptic number.

408404866 is a deficient number, since it is larger than the sum of its proper divisors (208570262).

408404866 is a wasteful number, since it uses less digits than its factorization.

408404866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757.

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 408404866 is about 20209.0293185991. The cubic root of 408404866 is about 741.9312023455.

The spelling of 408404866 in words is "four hundred eight million, four hundred four thousand, eight hundred sixty-six".