3521808 has 60 divisors (see below), whose sum is σ = 10137868. Its totient is φ = 1140480.

The previous prime is 3521803. The next prime is 3521831. The reversal of 3521808 is 8081253.

It is a happy number.

3521808 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 2985984 + 535824 = 1728^2 + 732^2 .

It is not an unprimeable number, because it can be changed into a prime (3521803) by changing a digit.

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, 4998 + ... + 5658.

Almost surely, 2^3521808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5068934).

3521808 is an abundant number, since it is smaller than the sum of its proper divisors (6616060).

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

3521808 is a wasteful number, since it uses less digits than its factorization.

3521808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 703 counting only the distinct ones).

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

The square root of 3521808 is about 1876.6480756924. The cubic root of 3521808 is about 152.1441384349.

The spelling of 3521808 in words is "three million, five hundred twenty-one thousand, eight hundred eight".