806421996 has 36 divisors (see below), whose sum is σ = 2158366392. Its totient is φ = 252994944.

The previous prime is 806421991. The next prime is 806422033. The reversal of 806421996 is 699124608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (806421991) 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 11 ways as a sum of consecutive naturals, for example, 658230 + ... + 659453.

It is an arithmetic number, because the mean of its divisors is an integer number (59954622).

Almost surely, 2^806421996 is an apocalyptic number.

It is an amenable number.

806421996 is an abundant number, since it is smaller than the sum of its proper divisors (1351944396).

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

806421996 is a wasteful number, since it uses less digits than its factorization.

806421996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317710 (or 1317705 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 806421996 is about 28397.5702481744. The cubic root of 806421996 is about 930.7951714598.

The spelling of 806421996 in words is "eight hundred six million, four hundred twenty-one thousand, nine hundred ninety-six".