2820720144 has 80 divisors (see below), whose sum is σ = 8084125440. Its totient is φ = 840266880.

The previous prime is 2820720143. The next prime is 2820720169. The reversal of 2820720144 is 4410270282.

It is not an unprimeable number, because it can be changed into a prime (2820720143) 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, 14122 + ... + 76425.

It is an arithmetic number, because the mean of its divisors is an integer number (101051568).

Almost surely, 2^2820720144 is an apocalyptic number.

2820720144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2820720144 is an abundant number, since it is smaller than the sum of its proper divisors (5263405296).

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

2820720144 is a wasteful number, since it uses less digits than its factorization.

2820720144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90628 (or 90622 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 2820720144 is about 53110.4523046076. The cubic root of 2820720144 is about 1412.9278971346.

The spelling of 2820720144 in words is "two billion, eight hundred twenty million, seven hundred twenty thousand, one hundred forty-four".