2820155712 has 168 divisors, whose sum is σ = 8634679200. Its totient is φ = 809487360.

The previous prime is 2820155699. The next prime is 2820155717. The reversal of 2820155712 is 2175510282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820155717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438214 + ... + 444602.

It is an arithmetic number, because the mean of its divisors is an integer number (51396900).

Almost surely, 2^2820155712 is an apocalyptic number.

2820155712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2820155712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4317339600).

2820155712 is an abundant number, since it is smaller than the sum of its proper divisors (5814523488).

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

2820155712 is a wasteful number, since it uses less digits than its factorization.

2820155712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 6424 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 2820155712 is about 53105.1382824675. The cubic root of 2820155712 is about 1412.8336475721.

Adding to 2820155712 its reverse (2175510282), we get a palindrome (4995665994).

The spelling of 2820155712 in words is "two billion, eight hundred twenty million, one hundred fifty-five thousand, seven hundred twelve".