797399980 has 192 divisors, whose sum is σ = 2023096320. Its totient is φ = 261273600.

The previous prime is 797399969. The next prime is 797400047. The reversal of 797399980 is 89993797.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6278677 + ... + 6278803.

It is an arithmetic number, because the mean of its divisors is an integer number (10536960).

Almost surely, 2^797399980 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 797399980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011548160).

797399980 is an abundant number, since it is smaller than the sum of its proper divisors (1225696340).

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

797399980 is a wasteful number, since it uses less digits than its factorization.

797399980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 7715736, while the sum is 61.

The square root of 797399980 is about 28238.2715476709. The cubic root of 797399980 is about 927.3109899337.

The spelling of 797399980 in words is "seven hundred ninety-seven million, three hundred ninety-nine thousand, nine hundred eighty".