2806945720 has 64 divisors (see below), whose sum is σ = 6453457920. Its totient is φ = 1098399744.

The previous prime is 2806945711. The next prime is 2806945721. The reversal of 2806945720 is 275496082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806945721) 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, 810232 + ... + 813688.

It is an arithmetic number, because the mean of its divisors is an integer number (100835280).

Almost surely, 2^2806945720 is an apocalyptic number.

2806945720 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 2806945720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3226728960).

2806945720 is an abundant number, since it is smaller than the sum of its proper divisors (3646512200).

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

2806945720 is a wasteful number, since it uses less digits than its factorization.

2806945720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904 (or 3900 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2806945720 is about 52980.6164554547. The cubic root of 2806945720 is about 1410.6242260622.

The spelling of 2806945720 in words is "two billion, eight hundred six million, nine hundred forty-five thousand, seven hundred twenty".