3640020220 has 48 divisors (see below), whose sum is σ = 7798079520. Its totient is φ = 1426892544.

The previous prime is 3640020211. The next prime is 3640020269. The reversal of 3640020220 is 220200463.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257086 + ... + 270874.

It is an arithmetic number, because the mean of its divisors is an integer number (162459990).

Almost surely, 2^3640020220 is an apocalyptic number.

It is an amenable number.

3640020220 is an abundant number, since it is smaller than the sum of its proper divisors (4158059300).

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

3640020220 is a wasteful number, since it uses less digits than its factorization.

3640020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062 (or 14060 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 3640020220 is about 60332.5800873790. The cubic root of 3640020220 is about 1538.2771845341.

Adding to 3640020220 its reverse (220200463), we get a palindrome (3860220683).

The spelling of 3640020220 in words is "three billion, six hundred forty million, twenty thousand, two hundred twenty".