420641808 has 20 divisors (see below), whose sum is σ = 1086658128. Its totient is φ = 140213920.

The previous prime is 420641807. The next prime is 420641827. The reversal of 420641808 is 808146024.

It is not an unprimeable number, because it can be changed into a prime (420641801) 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, 4381638 + ... + 4381733.

Almost surely, 2^420641808 is an apocalyptic number.

420641808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

420641808 is an abundant number, since it is smaller than the sum of its proper divisors (666016320).

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

420641808 is a wasteful number, since it uses less digits than its factorization.

420641808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8763382 (or 8763376 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 420641808 is about 20509.5540663370. The cubic root of 420641808 is about 749.2685063435.

The spelling of 420641808 in words is "four hundred twenty million, six hundred forty-one thousand, eight hundred eight".