809956 has 12 divisors (see below), whose sum is σ = 1619968. Its totient is φ = 347112.

The previous prime is 809929. The next prime is 809981. The reversal of 809956 is 659908.

809956 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

809956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 14436 + ... + 14491.

2⁸⁰⁹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

809956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

809956 is a wasteful number, since it uses less digits than its factorization.

809956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28938 (or 28936 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 809956 is about 899.9755552236. The cubic root of 809956 is about 93.2152872687.

The spelling of 809956 in words is "eight hundred nine thousand, nine hundred fifty-six".