2802820 has 24 divisors (see below), whose sum is σ = 5917464. Its totient is φ = 1115136.

The previous prime is 2802797. The next prime is 2802847. The reversal of 2802820 is 282082.

It can be written as a sum of positive squares in 4 ways, for example, as 350464 + 2452356 = 592^2 + 1566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2802791 and 2802800.

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, 6862 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (246561).

2^2802820 is an apocalyptic number.

2802820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2802820 is an abundant number, since it is smaller than the sum of its proper divisors (3114644).

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

2802820 is a wasteful number, since it uses less digits than its factorization.

2802820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 2802820 is about 1674.1624771808. The cubic root of 2802820 is about 140.9932763422.

The spelling of 2802820 in words is "two million, eight hundred two thousand, eight hundred twenty".