797856 has 24 divisors (see below), whose sum is σ = 2094624. Its totient is φ = 265920.

The previous prime is 797851. The next prime is 797869. The reversal of 797856 is 658797.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (797851) by changing a digit.

797856 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4060 + ... + 4251.

It is an arithmetic number, because the mean of its divisors is an integer number (87276).

2⁷⁹⁷⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

797856 is an abundant number, since it is smaller than the sum of its proper divisors (1296768).

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

797856 is a wasteful number, since it uses less digits than its factorization.

797856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324 (or 8316 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 797856 is about 893.2278544694. The cubic root of 797856 is about 92.7487727574.

It can be divided in two parts, 797 and 856, that added together give a triangular number (1653 = T₅₇).

The spelling of 797856 in words is "seven hundred ninety-seven thousand, eight hundred fifty-six".