2800720 has 40 divisors (see below), whose sum is σ = 7015176. Its totient is φ = 1033728.

The previous prime is 2800709. The next prime is 2800729. The reversal of 2800720 is 270082.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 2782224 = 136^2 + 1668^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2800729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 2386.

2^2800720 is an apocalyptic number.

2800720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2800720 is an abundant number, since it is smaller than the sum of its proper divisors (4214456).

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

2800720 is a wasteful number, since it uses less digits than its factorization.

2800720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719 (or 2713 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 2800720 is about 1673.5351803891. The cubic root of 2800720 is about 140.9580546895.

The spelling of 2800720 in words is "two million, eight hundred thousand, seven hundred twenty".