2802780 has 72 divisors (see below), whose sum is σ = 8884512. Its totient is φ = 713856.

The previous prime is 2802749. The next prime is 2802797. The reversal of 2802780 is 872082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3802 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (123396).

2^2802780 is an apocalyptic number.

2802780 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 2802780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4442256).

2802780 is an abundant number, since it is smaller than the sum of its proper divisors (6081732).

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

2802780 is a wasteful number, since it uses less digits than its factorization.

2802780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 2802780 is about 1674.1505308663. The cubic root of 2802780 is about 140.9926056180.

The spelling of 2802780 in words is "two million, eight hundred two thousand, seven hundred eighty".