2808285844 has 108 divisors (see below), whose sum is σ = 6242953500. Its totient is φ = 1101574656.

The previous prime is 2808285841. The next prime is 2808285871. The reversal of 2808285844 is 4485828082.

It can be written as a sum of positive squares in 6 ways, for example, as 1423552900 + 1384732944 = 37730^2 + 37212^2 .

It is a super-2 number, since 2×2808285844² = 15772938763221584672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808285841) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4935192 + ... + 4935760.

It is an arithmetic number, because the mean of its divisors is an integer number (57805125).

Almost surely, 2^2808285844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2808285844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3121476750).

2808285844 is an abundant number, since it is smaller than the sum of its proper divisors (3434667656).

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

2808285844 is a wasteful number, since it uses less digits than its factorization.

2808285844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 1310720, while the sum is 49.

The square root of 2808285844 is about 52993.2622509692. The cubic root of 2808285844 is about 1410.8486824407.

The spelling of 2808285844 in words is "two billion, eight hundred eight million, two hundred eighty-five thousand, eight hundred forty-four".