3521800 has 24 divisors (see below), whose sum is σ = 8188650. Its totient is φ = 1408640.

The previous prime is 3521767. The next prime is 3521803. The reversal of 3521800 is 81253.

It is a happy number.

3521800 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 3 ways, for example, as 2965284 + 556516 = 1722^2 + 746^2 .

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 5 ways as a sum of consecutive naturals, for example, 8605 + ... + 9004.

Almost surely, 2^3521800 is an apocalyptic number.

It is an amenable number.

3521800 is an abundant number, since it is smaller than the sum of its proper divisors (4666850).

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

3521800 is a wasteful number, since it uses less digits than its factorization.

3521800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17625 (or 17616 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3521800 is about 1876.6459442314. The cubic root of 3521800 is about 152.1440232333.

The spelling of 3521800 in words is "three million, five hundred twenty-one thousand, eight hundred".