2820500 has 24 divisors (see below), whose sum is σ = 6161064. Its totient is φ = 1128000.

The previous prime is 2820491. The next prime is 2820509. The reversal of 2820500 is 50282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2820491) and next prime (2820509).

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 2775556 = 212^2 + 1666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820509) 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, 2321 + ... + 3320.

It is an arithmetic number, because the mean of its divisors is an integer number (256711).

2^2820500 is an apocalyptic number.

2820500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820500 is an abundant number, since it is smaller than the sum of its proper divisors (3340564).

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

2820500 is a wasteful number, since it uses less digits than its factorization.

2820500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660 (or 5648 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2820500 is about 1679.4344286098. The cubic root of 2820500 is about 141.2891138709.

Adding to 2820500 its reverse (50282), we get a palindrome (2870782).

The spelling of 2820500 in words is "two million, eight hundred twenty thousand, five hundred".