3621578 has 16 divisors (see below), whose sum is σ = 5951880. Its totient is φ = 1645056.

The previous prime is 3621577. The next prime is 3621581. The reversal of 3621578 is 8751263.

It is a happy number.

3621578 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 4 ways, for example, as 2798929 + 822649 = 1673^2 + 907^2 .

It is not an unprimeable number, because it can be changed into a prime (3621577) 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 7 ways as a sum of consecutive naturals, for example, 851 + ... + 2822.

Almost surely, 2^3621578 is an apocalyptic number.

3621578 is a deficient number, since it is larger than the sum of its proper divisors (2330302).

3621578 is a wasteful number, since it uses less digits than its factorization.

3621578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its digits is 10080, while the sum is 32.

The square root of 3621578 is about 1903.0444030553. The cubic root of 3621578 is about 153.5674882813.

The spelling of 3621578 in words is "three million, six hundred twenty-one thousand, five hundred seventy-eight".