2783280 has 40 divisors (see below), whose sum is σ = 8628912. Its totient is φ = 742144.

The previous prime is 2783267. The next prime is 2783281. The reversal of 2783280 is 823872.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2783281) 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, 5559 + ... + 6038.

2^2783280 is an apocalyptic number.

2783280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2783280 is an abundant number, since it is smaller than the sum of its proper divisors (5845632).

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

2783280 is a wasteful number, since it uses less digits than its factorization.

2783280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11613 (or 11607 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2783280 is about 1668.3165167318. The cubic root of 2783280 is about 140.6648647474.

The spelling of 2783280 in words is "two million, seven hundred eighty-three thousand, two hundred eighty".