3523840 has 36 divisors (see below), whose sum is σ = 8443764. Its totient is φ = 1409024.

The previous prime is 3523829. The next prime is 3523841. The reversal of 3523840 is 483253.

It can be written as a sum of positive squares in 2 ways, for example, as 2408704 + 1115136 = 1552^2 + 1056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3523841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (234549).

Almost surely, 2^3523840 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 3523840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4221882).

3523840 is an abundant number, since it is smaller than the sum of its proper divisors (4919924).

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

3523840 is an equidigital number, since it uses as much as digits as its factorization.

3523840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 3523840 is about 1877.1893884209. The cubic root of 3523840 is about 152.1733940000.

The spelling of 3523840 in words is "three million, five hundred twenty-three thousand, eight hundred forty".