2805013800 has 120 divisors (see below), whose sum is σ = 9742284750. Its totient is φ = 747999360.

The previous prime is 2805013781. The next prime is 2805013823. The reversal of 2805013800 is 83105082.

It is a happy number.

2805013800 is a `hidden beast` number, since 2 + 80 + 501 + 3 + 80 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2039606244 + 765407556 = 45162^2 + 27666^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 70375 + ... + 102774.

Almost surely, 2^2805013800 is an apocalyptic number.

2805013800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2805013800 is an abundant number, since it is smaller than the sum of its proper divisors (6937270950).

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

2805013800 is a wasteful number, since it uses less digits than its factorization.

2805013800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173177 (or 173159 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2805013800 is about 52962.3809887735. The cubic root of 2805013800 is about 1410.3005244439.

Adding to 2805013800 its reverse (83105082), we get a palindrome (2888118882).

The spelling of 2805013800 in words is "two billion, eight hundred five million, thirteen thousand, eight hundred".