79287886980 has 72 divisors (see below), whose sum is σ = 240662304792. Its totient is φ = 21129747456.

The previous prime is 79287886919. The next prime is 79287886987. The reversal of 79287886980 is 8968878297.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 806105664 + 78481781316 = 28392^2 + 280146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79287886899 and 79287886908.

It is not an unprimeable number, because it can be changed into a prime (79287886987) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 137722 + ... + 421358.

It is an arithmetic number, because the mean of its divisors is an integer number (3342532011).

Almost surely, 2^79287886980 is an apocalyptic number.

It is an amenable number.

79287886980 is an abundant number, since it is smaller than the sum of its proper divisors (161374417812).

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

79287886980 is a wasteful number, since it uses less digits than its factorization.

79287886980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285205 (or 285200 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 72.

The spelling of 79287886980 in words is "seventy-nine billion, two hundred eighty-seven million, eight hundred eighty-six thousand, nine hundred eighty".