2808657220 has 12 divisors (see below), whose sum is σ = 5898180204. Its totient is φ = 1123462880.

The previous prime is 2808657209. The next prime is 2808657253. The reversal of 2808657220 is 227568082.

It can be written as a sum of positive squares in 2 ways, for example, as 1866412804 + 942244416 = 43202^2 + 30696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70216411 + ... + 70216450.

It is an arithmetic number, because the mean of its divisors is an integer number (491515017).

Almost surely, 2^2808657220 is an apocalyptic number.

2808657220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2808657220 is an abundant number, since it is smaller than the sum of its proper divisors (3089522984).

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

2808657220 is a wasteful number, since it uses less digits than its factorization.

2808657220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140432870 (or 140432868 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 2808657220 is about 52996.7661277554. The cubic root of 2808657220 is about 1410.9108712959.

The spelling of 2808657220 in words is "two billion, eight hundred eight million, six hundred fifty-seven thousand, two hundred twenty".