2806720 has 84 divisors (see below), whose sum is σ = 7818120. Its totient is φ = 956928.

The previous prime is 2806711. The next prime is 2806757. The reversal of 2806720 is 276082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15591 + ... + 15769.

2^2806720 is an apocalyptic number.

2806720 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 2806720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3909060).

2806720 is an abundant number, since it is smaller than the sum of its proper divisors (5011400).

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

2806720 is a wasteful number, since it uses less digits than its factorization.

2806720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2806720 is about 1675.3268337850. The cubic root of 2806720 is about 141.0586413357.

The spelling of 2806720 in words is "two million, eight hundred six thousand, seven hundred twenty".