420889820 has 24 divisors (see below), whose sum is σ = 951859104. Its totient is φ = 155405376.

The previous prime is 420889793. The next prime is 420889853. The reversal of 420889820 is 28988024.

It is a congruent number.

It is an unprimeable number.

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, 809144 + ... + 809663.

It is an arithmetic number, because the mean of its divisors is an integer number (39660796).

Almost surely, 2^420889820 is an apocalyptic number.

It is an amenable number.

420889820 is an abundant number, since it is smaller than the sum of its proper divisors (530969284).

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

420889820 is a wasteful number, since it uses less digits than its factorization.

420889820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618829 (or 1618827 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 420889820 is about 20515.5994306771. The cubic root of 420889820 is about 749.4157345931.

The spelling of 420889820 in words is "four hundred twenty million, eight hundred eighty-nine thousand, eight hundred twenty".