2808218420 has 36 divisors (see below), whose sum is σ = 6860078820. Its totient is φ = 962817408.

The previous prime is 2808218417. The next prime is 2808218473. The reversal of 2808218420 is 248128082.

It can be written as a sum of positive squares in 2 ways, for example, as 1139332516 + 1668885904 = 33754^2 + 40852^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1431785 + ... + 1433744.

It is an arithmetic number, because the mean of its divisors is an integer number (190557745).

Almost surely, 2^2808218420 is an apocalyptic number.

2808218420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2808218420 is an abundant number, since it is smaller than the sum of its proper divisors (4051860400).

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

2808218420 is a wasteful number, since it uses less digits than its factorization.

2808218420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865552 (or 2865543 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 2808218420 is about 52992.6260908063. The cubic root of 2808218420 is about 1410.8373913509.

The spelling of 2808218420 in words is "two billion, eight hundred eight million, two hundred eighteen thousand, four hundred twenty".