805671916 has 18 divisors (see below), whose sum is σ = 1640118228. Its totient is φ = 345287880.

The previous prime is 805671913. The next prime is 805671931. The reversal of 805671916 is 619176508.

It is a happy number.

It is a super-2 number, since 2×805671916² = 1298214472462222112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (805671913) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2055090 + ... + 2055481.

Almost surely, 2^805671916 is an apocalyptic number.

It is an amenable number.

805671916 is an abundant number, since it is smaller than the sum of its proper divisors (834446312).

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

805671916 is a wasteful number, since it uses less digits than its factorization.

805671916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110589 (or 4110580 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 805671916 is about 28384.3604120297. The cubic root of 805671916 is about 930.5064940587.

The spelling of 805671916 in words is "eight hundred five million, six hundred seventy-one thousand, nine hundred sixteen".