3503820 has 48 divisors (see below), whose sum is σ = 10241280. Its totient is φ = 893376.

The previous prime is 3503813. The next prime is 3503821. The reversal of 3503820 is 283053.

It is not an unprimeable number, because it can be changed into a prime (3503821) 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 15 ways as a sum of consecutive naturals, for example, 111 + ... + 2649.

It is an arithmetic number, because the mean of its divisors is an integer number (213360).

Almost surely, 2^3503820 is an apocalyptic number.

3503820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3503820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5120640).

3503820 is an abundant number, since it is smaller than the sum of its proper divisors (6737460).

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

3503820 is a wasteful number, since it uses less digits than its factorization.

3503820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3503820 is about 1871.8493529128. The cubic root of 3503820 is about 151.8846655096.

Adding to 3503820 its reverse (283053), we get a palindrome (3786873).

The spelling of 3503820 in words is "three million, five hundred three thousand, eight hundred twenty".