420571808 has 12 divisors (see below), whose sum is σ = 828000810. Its totient is φ = 210285888.

The previous prime is 420571807. The next prime is 420571817. The reversal of 420571808 is 808175024.

It can be written as a sum of positive squares in only one way, i.e., 395691664 + 24880144 = 19892^2 + 4988^2 .

It is not an unprimeable number, because it can be changed into a prime (420571807) 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 as a sum of consecutive naturals, namely, 6571403 + ... + 6571466.

Almost surely, 2^420571808 is an apocalyptic number.

It is an amenable number.

420571808 is a deficient number, since it is larger than the sum of its proper divisors (407429002).

420571808 is a wasteful number, since it uses less digits than its factorization.

420571808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13142879 (or 13142871 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 420571808 is about 20507.8474735892. The cubic root of 420571808 is about 749.2269415220.

The spelling of 420571808 in words is "four hundred twenty million, five hundred seventy-one thousand, eight hundred eight".