2820091820 has 48 divisors (see below), whose sum is σ = 7288857408. Its totient is φ = 892512000.

The previous prime is 2820091817. The next prime is 2820091829. The reversal of 2820091820 is 281900282.

2820091820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2820091829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772931 + ... + 776570.

It is an arithmetic number, because the mean of its divisors is an integer number (151851196).

Almost surely, 2^2820091820 is an apocalyptic number.

2820091820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820091820 is an abundant number, since it is smaller than the sum of its proper divisors (4468765588).

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

2820091820 is a wasteful number, since it uses less digits than its factorization.

2820091820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549530 (or 1549528 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 2820091820 is about 53104.5367176854. The cubic root of 2820091820 is about 1412.8229780136.

The spelling of 2820091820 in words is "two billion, eight hundred twenty million, ninety-one thousand, eight hundred twenty".