2862820 has 12 divisors (see below), whose sum is σ = 6011964. Its totient is φ = 1145120.

The previous prime is 2862803. The next prime is 2862829. The reversal of 2862820 is 282682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1747684 + 1115136 = 1322^2 + 1056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2862829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71551 + ... + 71590.

It is an arithmetic number, because the mean of its divisors is an integer number (500997).

2^2862820 is an apocalyptic number.

2862820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2862820 is an abundant number, since it is smaller than the sum of its proper divisors (3149144).

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

2862820 is a wasteful number, since it uses less digits than its factorization.

2862820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143150 (or 143148 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2862820 is about 1691.9869975860. The cubic root of 2862820 is about 141.9922630182.

The spelling of 2862820 in words is "two million, eight hundred sixty-two thousand, eight hundred twenty".