2820558980 has 12 divisors (see below), whose sum is σ = 5923173900. Its totient is φ = 1128223584.

The previous prime is 2820558973. The next prime is 2820558989. The reversal of 2820558980 is 898550282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1157224324 + 1663334656 = 34018^2 + 40784^2 .

It is not an unprimeable number, because it can be changed into a prime (2820558989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70513955 + ... + 70513994.

It is an arithmetic number, because the mean of its divisors is an integer number (493597825).

Almost surely, 2^2820558980 is an apocalyptic number.

2820558980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820558980 is an abundant number, since it is smaller than the sum of its proper divisors (3102614920).

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

2820558980 is a wasteful number, since it uses less digits than its factorization.

2820558980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141027958 (or 141027956 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 47.

The square root of 2820558980 is about 53108.9350298045. The cubic root of 2820558980 is about 1412.9009870506.

The spelling of 2820558980 in words is "two billion, eight hundred twenty million, five hundred fifty-eight thousand, nine hundred eighty".