3643199240 has 64 divisors (see below), whose sum is σ = 8524321200. Its totient is φ = 1399652352.

The previous prime is 3643199239. The next prime is 3643199249. The reversal of 3643199240 is 429913463.

It can be written as a sum of positive squares in 8 ways, for example, as 2199047236 + 1444152004 = 46894^2 + 38002^2 .

It is not an unprimeable number, because it can be changed into a prime (3643199249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215744 + ... + 232016.

Almost surely, 2^3643199240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3643199240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4262160600).

3643199240 is an abundant number, since it is smaller than the sum of its proper divisors (4881121960).

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

3643199240 is a wasteful number, since it uses less digits than its factorization.

3643199240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16506 (or 16502 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 3643199240 is about 60358.9201361323. The cubic root of 3643199240 is about 1538.7248735306.

The spelling of 3643199240 in words is "three billion, six hundred forty-three million, one hundred ninety-nine thousand, two hundred forty".