2820055500 has 240 divisors, whose sum is σ = 9275666400. Its totient is φ = 745891200.

The previous prime is 2820055493. The next prime is 2820055517. The reversal of 2820055500 is 55500282.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7249306 + ... + 7249694.

It is an arithmetic number, because the mean of its divisors is an integer number (38648610).

Almost surely, 2^2820055500 is an apocalyptic number.

2820055500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2820055500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4637833200).

2820055500 is an abundant number, since it is smaller than the sum of its proper divisors (6455610900).

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

2820055500 is a wasteful number, since it uses less digits than its factorization.

2820055500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2820055500 is about 53104.1947495676. The cubic root of 2820055500 is about 1412.8169127323.

Adding to 2820055500 its reverse (55500282), we get a palindrome (2875555782).

The spelling of 2820055500 in words is "two billion, eight hundred twenty million, fifty-five thousand, five hundred".