798639980 has 48 divisors (see below), whose sum is σ = 1768144896. Its totient is φ = 302562240.

The previous prime is 798639979. The next prime is 798640001. The reversal of 798639980 is 89936897.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15437 + ... + 42843.

It is an arithmetic number, because the mean of its divisors is an integer number (36836352).

Almost surely, 2^798639980 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 798639980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884072448).

798639980 is an abundant number, since it is smaller than the sum of its proper divisors (969504916).

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

798639980 is a wasteful number, since it uses less digits than its factorization.

798639980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27494 (or 27492 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 798639980 is about 28260.2190366600. The cubic root of 798639980 is about 927.7914138683.

The spelling of 798639980 in words is "seven hundred ninety-eight million, six hundred thirty-nine thousand, nine hundred eighty".