2820538 has 24 divisors (see below), whose sum is σ = 5214132. Its totient is φ = 1137024.

The previous prime is 2820527. The next prime is 2820541. The reversal of 2820538 is 8350282.

2820538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 21609 = 1673^2 + 147^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820 + ... + 2512.

2^2820538 is an apocalyptic number.

2820538 is a deficient number, since it is larger than the sum of its proper divisors (2393594).

2820538 is a wasteful number, since it uses less digits than its factorization.

2820538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2820538 is about 1679.4457419042. The cubic root of 2820538 is about 141.2897483875.

The spelling of 2820538 in words is "two million, eight hundred twenty thousand, five hundred thirty-eight".