2604820 has 12 divisors (see below), whose sum is σ = 5470164. Its totient is φ = 1041920.

The previous prime is 2604803. The next prime is 2604821. The reversal of 2604820 is 284062.

It can be written as a sum of positive squares in 2 ways, for example, as 1249924 + 1354896 = 1118^2 + 1164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2604791 and 2604800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604821) 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, 65101 + ... + 65140.

It is an arithmetic number, because the mean of its divisors is an integer number (455847).

2^2604820 is an apocalyptic number.

2604820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2604820 is an abundant number, since it is smaller than the sum of its proper divisors (2865344).

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

2604820 is a wasteful number, since it uses less digits than its factorization.

2604820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130250 (or 130248 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2604820 is about 1613.9454761546. The cubic root of 2604820 is about 137.5918064573.

Adding to 2604820 its reverse (284062), we get a palindrome (2888882).

The spelling of 2604820 in words is "two million, six hundred four thousand, eight hundred twenty".