2805122720 has 24 divisors (see below), whose sum is σ = 6627102804. Its totient is φ = 1122049024.

The previous prime is 2805122693. The next prime is 2805122729. The reversal of 2805122720 is 272215082.

It can be written as a sum of positive squares in 2 ways, for example, as 2707745296 + 97377424 = 52036^2 + 9868^2 .

It is not an unprimeable number, because it can be changed into a prime (2805122729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8765849 + ... + 8766168.

Almost surely, 2^2805122720 is an apocalyptic number.

2805122720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2805122720 is an abundant number, since it is smaller than the sum of its proper divisors (3821980084).

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

2805122720 is a wasteful number, since it uses less digits than its factorization.

2805122720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17532032 (or 17532024 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 2805122720 is about 52963.4092558249. The cubic root of 2805122720 is about 1410.3187784176.

The spelling of 2805122720 in words is "two billion, eight hundred five million, one hundred twenty-two thousand, seven hundred twenty".