797640 has 96 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 191488.

The previous prime is 797633. The next prime is 797647. The reversal of 797640 is 46797.

It is an interprime number because it is at equal distance from previous prime (797633) and next prime (797647).

It is not an unprimeable number, because it can be changed into a prime (797647) by changing a digit.

797640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34669 + ... + 34691.

It is an arithmetic number, because the mean of its divisors is an integer number (27630).

2⁷⁹⁷⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 797640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326240).

797640 is an abundant number, since it is smaller than the sum of its proper divisors (1854840).

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

797640 is a wasteful number, since it uses less digits than its factorization.

797640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 797640 is about 893.1069364863. The cubic root of 797640 is about 92.7404021813.

The spelling of 797640 in words is "seven hundred ninety-seven thousand, six hundred forty".