3531640 has 32 divisors (see below), whose sum is σ = 9082080. Its totient is φ = 1210752.

The previous prime is 3531623. The next prime is 3531659. The reversal of 3531640 is 461353.

It is a congruent number.

It is an unprimeable number.

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, 6027 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (283815).

Almost surely, 2^3531640 is an apocalyptic number.

It is an amenable number.

3531640 is an abundant number, since it is smaller than the sum of its proper divisors (5550440).

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

3531640 is a wasteful number, since it uses less digits than its factorization.

3531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12627 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 3531640 is about 1879.2658140880. The cubic root of 3531640 is about 152.2855895762.

Adding to 3531640 its reverse (461353), we get a palindrome (3992993).

The spelling of 3531640 in words is "three million, five hundred thirty-one thousand, six hundred forty".