2782818220 has 72 divisors (see below), whose sum is σ = 7232095584. Its totient is φ = 880708608.

The previous prime is 2782818217. The next prime is 2782818251. The reversal of 2782818220 is 228182872.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35149 + ... + 82468.

It is an arithmetic number, because the mean of its divisors is an integer number (100445772).

Almost surely, 2^2782818220 is an apocalyptic number.

2782818220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2782818220 is an abundant number, since it is smaller than the sum of its proper divisors (4449277364).

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

2782818220 is a wasteful number, since it uses less digits than its factorization.

2782818220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117659 (or 117644 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 2782818220 is about 52752.4238305692. The cubic root of 2782818220 is about 1406.5708497984.

The spelling of 2782818220 in words is "two billion, seven hundred eighty-two million, eight hundred eighteen thousand, two hundred twenty".