3521380 has 24 divisors (see below), whose sum is σ = 7830648. Its totient is φ = 1325568.

The previous prime is 3521377. The next prime is 3521389. The reversal of 3521380 is 831253.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 2802276 = 848^2 + 1674^2 .

It is not an unprimeable number, because it can be changed into a prime (3521389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4839 + ... + 5518.

It is an arithmetic number, because the mean of its divisors is an integer number (326277).

Almost surely, 2^3521380 is an apocalyptic number.

It is an amenable number.

3521380 is an abundant number, since it is smaller than the sum of its proper divisors (4309268).

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

3521380 is a wasteful number, since it uses less digits than its factorization.

3521380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383 (or 10381 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 3521380 is about 1876.5340391264. The cubic root of 3521380 is about 152.1379749029.

The spelling of 3521380 in words is "three million, five hundred twenty-one thousand, three hundred eighty".