797985 has 32 divisors (see below), whose sum is σ = 1486080. Its totient is φ = 405504.

The previous prime is 797977. The next prime is 797987. The reversal of 797985 is 589797.

It is not a de Polignac number, because 797985 - 2³ = 797977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (158760) is a multiple of the sum of its prime factors (294).

It is a self number, because there is not a number n which added to its sum of digits gives 797985.

It is not an unprimeable number, because it can be changed into a prime (797987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2977 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (46440).

2⁷⁹⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

797985 is a deficient number, since it is larger than the sum of its proper divisors (688095).

797985 is a wasteful number, since it uses less digits than its factorization.

797985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 288 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 797985 is about 893.3000615695. The cubic root of 797985 is about 92.7537711309.

The spelling of 797985 in words is "seven hundred ninety-seven thousand, nine hundred eighty-five".