2820506 has 16 divisors (see below), whose sum is σ = 4614624. Its totient is φ = 1285104.

The previous prime is 2820491. The next prime is 2820509. The reversal of 2820506 is 6050282.

It is a happy 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, 1505 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (288414).

2^2820506 is an apocalyptic number.

2820506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2820506 is a deficient number, since it is larger than the sum of its proper divisors (1794118).

2820506 is a wasteful number, since it uses less digits than its factorization.

2820506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2820506 is about 1679.4362149245. The cubic root of 2820506 is about 141.2892140582.

Adding to 2820506 its reverse (6050282), we get a palindrome (8870788).

The spelling of 2820506 in words is "two million, eight hundred twenty thousand, five hundred six".