3640203640 has 16 divisors (see below), whose sum is σ = 8190458280. Its totient is φ = 1456081440.

The previous prime is 3640203631. The next prime is 3640203647. The reversal of 3640203640 is 463020463.

It is a junction number, because it is equal to n+sod(n) for n = 3640203599 and 3640203608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640203647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45502506 + ... + 45502585.

Almost surely, 2^3640203640 is an apocalyptic number.

It is an amenable number.

3640203640 is an abundant number, since it is smaller than the sum of its proper divisors (4550254640).

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

3640203640 is a wasteful number, since it uses less digits than its factorization.

3640203640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91005102 (or 91005098 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 3640203640 is about 60334.1001424568. The cubic root of 3640203640 is about 1538.3030219421.

The spelling of 3640203640 in words is "three billion, six hundred forty million, two hundred three thousand, six hundred forty".