3518820 has 72 divisors (see below), whose sum is σ = 10830456. Its totient is φ = 924672.

The previous prime is 3518807. The next prime is 3518833. The reversal of 3518820 is 288153.

It is a happy number.

3518820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3518807) and next prime (3518833).

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 3326976 = 438^2 + 1824^2 .

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 20254 + ... + 20426.

It is an arithmetic number, because the mean of its divisors is an integer number (150423).

Almost surely, 2^3518820 is an apocalyptic number.

3518820 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 3518820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5415228).

3518820 is an abundant number, since it is smaller than the sum of its proper divisors (7311636).

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

3518820 is a wasteful number, since it uses less digits than its factorization.

3518820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 3518820 is about 1875.8518065135. The cubic root of 3518820 is about 152.1010984856.

The spelling of 3518820 in words is "three million, five hundred eighteen thousand, eight hundred twenty".