420899656 has 16 divisors (see below), whose sum is σ = 789431040. Its totient is φ = 210384720.

The previous prime is 420899621. The next prime is 420899669. The reversal of 420899656 is 656998024.

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 3 ways as a sum of consecutive naturals, for example, 29661 + ... + 41491.

It is an arithmetic number, because the mean of its divisors is an integer number (49339440).

Almost surely, 2^420899656 is an apocalyptic number.

It is an amenable number.

420899656 is a deficient number, since it is larger than the sum of its proper divisors (368531384).

420899656 is a wasteful number, since it uses less digits than its factorization.

420899656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284 (or 16280 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 420899656 is about 20515.8391493012. The cubic root of 420899656 is about 749.4215723804.

The spelling of 420899656 in words is "four hundred twenty million, eight hundred ninety-nine thousand, six hundred fifty-six".