2801247720 has 64 divisors (see below), whose sum is σ = 8428086720. Its totient is φ = 744835584.

The previous prime is 2801247719. The next prime is 2801247749. The reversal of 2801247720 is 277421082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8004 + ... + 75276.

It is an arithmetic number, because the mean of its divisors is an integer number (131688855).

Almost surely, 2^2801247720 is an apocalyptic number.

2801247720 is a gapful number since it is divisible by the number (20) 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 2801247720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4214043360).

2801247720 is an abundant number, since it is smaller than the sum of its proper divisors (5626839000).

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

2801247720 is a wasteful number, since it uses less digits than its factorization.

2801247720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67634 (or 67630 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 2801247720 is about 52926.8147539600. The cubic root of 2801247720 is about 1409.6690737890.

The spelling of 2801247720 in words is "two billion, eight hundred one million, two hundred forty-seven thousand, seven hundred twenty".