3521920 has 32 divisors (see below), whose sum is σ = 8421120. Its totient is φ = 1408512.

The previous prime is 3521909. The next prime is 3521923. The reversal of 3521920 is 291253.

3521920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 3521891 and 3521900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521923) 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 3 ways as a sum of consecutive naturals, for example, 2112 + ... + 3391.

It is an arithmetic number, because the mean of its divisors is an integer number (263160).

Almost surely, 2^3521920 is an apocalyptic number.

It is an amenable number.

3521920 is an abundant number, since it is smaller than the sum of its proper divisors (4899200).

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

3521920 is an equidigital number, since it uses as much as digits as its factorization.

3521920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522 (or 5510 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 3521920 is about 1876.6779158929. The cubic root of 3521920 is about 152.1457512394.

The spelling of 3521920 in words is "three million, five hundred twenty-one thousand, nine hundred twenty".