2818785820 has 24 divisors (see below), whose sum is σ = 5938496928. Its totient is φ = 1123886400.

The previous prime is 2818785811. The next prime is 2818785841. The reversal of 2818785820 is 285878182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220371 + ... + 232810.

It is an arithmetic number, because the mean of its divisors is an integer number (247437372).

Almost surely, 2^2818785820 is an apocalyptic number.

2818785820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2818785820 is an abundant number, since it is smaller than the sum of its proper divisors (3119711108).

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

2818785820 is a wasteful number, since it uses less digits than its factorization.

2818785820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453501 (or 453499 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 49.

The square root of 2818785820 is about 53092.2387925015. The cubic root of 2818785820 is about 1412.6048489794.

The spelling of 2818785820 in words is "two billion, eight hundred eighteen million, seven hundred eighty-five thousand, eight hundred twenty".