2803280 has 40 divisors (see below), whose sum is σ = 6627552. Its totient is φ = 1102464.

The previous prime is 2803259. The next prime is 2803291. The reversal of 2803280 is 823082.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5099 + ... + 5621.

2^2803280 is an apocalyptic number.

2803280 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 2803280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3313776).

2803280 is an abundant number, since it is smaller than the sum of its proper divisors (3824272).

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

2803280 is a wasteful number, since it uses less digits than its factorization.

2803280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2803280 is about 1674.2998536702. The cubic root of 2803280 is about 141.0009892122. Note that the first 3 decimals are identical.

The spelling of 2803280 in words is "two million, eight hundred three thousand, two hundred eighty".