2805503000 has 64 divisors (see below), whose sum is σ = 6579705600. Its totient is φ = 1119667200.

The previous prime is 2805502961. The next prime is 2805503009. The reversal of 2805503000 is 3055082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805503009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 476072 + ... + 481928.

It is an arithmetic number, because the mean of its divisors is an integer number (102807900).

Almost surely, 2^2805503000 is an apocalyptic number.

2805503000 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 2805503000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3289852800).

2805503000 is an abundant number, since it is smaller than the sum of its proper divisors (3774202600).

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

2805503000 is a wasteful number, since it uses less digits than its factorization.

2805503000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357 (or 6343 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2805503000 is about 52966.9991598542. Note that the first 3 decimals coincide. The cubic root of 2805503000 is about 1410.3825060860.

Adding to 2805503000 its reverse (3055082), we get a palindrome (2808558082).

The spelling of 2805503000 in words is "two billion, eight hundred five million, five hundred three thousand".