427807805 has 16 divisors (see below), whose sum is σ = 545925744. Its totient is φ = 320716800.

The previous prime is 427807777. The next prime is 427807829. The reversal of 427807805 is 508708724.

It can be written as a sum of positive squares in 8 ways, for example, as 9114361 + 418693444 = 3019^2 + 20462^2 .

It is not a de Polignac number, because 427807805 - 2¹⁸ = 427545661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9005 + ... + 30605.

It is an arithmetic number, because the mean of its divisors is an integer number (34120359).

Almost surely, 2^427807805 is an apocalyptic number.

It is an amenable number.

427807805 is a deficient number, since it is larger than the sum of its proper divisors (118117939).

427807805 is a wasteful number, since it uses less digits than its factorization.

427807805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21856.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 427807805 is about 20683.5152960032. The cubic root of 427807805 is about 753.4993833241.

The spelling of 427807805 in words is "four hundred twenty-seven million, eight hundred seven thousand, eight hundred five".