797717680 has 80 divisors (see below), whose sum is σ = 1888941600. Its totient is φ = 313251840.

The previous prime is 797717677. The next prime is 797717729. The reversal of 797717680 is 86717797.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288411 + ... + 1289029.

It is an arithmetic number, because the mean of its divisors is an integer number (23611770).

Almost surely, 2^797717680 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 797717680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944470800).

797717680 is an abundant number, since it is smaller than the sum of its proper divisors (1091223920).

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

797717680 is a wasteful number, since it uses less digits than its factorization.

797717680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 1037232, while the sum is 52.

The square root of 797717680 is about 28243.8963317741. The cubic root of 797717680 is about 927.4341266245.

The spelling of 797717680 in words is "seven hundred ninety-seven million, seven hundred seventeen thousand, six hundred eighty".