3649939940 has 24 divisors (see below), whose sum is σ = 7757225280. Its totient is φ = 1442385248.

The previous prime is 3649939901. The next prime is 3649939949. The reversal of 3649939940 is 499399463.

It is not an unprimeable number, because it can be changed into a prime (3649939949) 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 7 ways as a sum of consecutive naturals, for example, 1097720 + ... + 1101039.

It is an arithmetic number, because the mean of its divisors is an integer number (323217720).

Almost surely, 2^3649939940 is an apocalyptic number.

It is an amenable number.

3649939940 is an abundant number, since it is smaller than the sum of its proper divisors (4107285340).

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

3649939940 is a wasteful number, since it uses less digits than its factorization.

3649939940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198851 (or 2198849 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 56.

The square root of 3649939940 is about 60414.7328058314. The cubic root of 3649939940 is about 1539.6732792020.

The spelling of 3649939940 in words is "three billion, six hundred forty-nine million, nine hundred thirty-nine thousand, nine hundred forty".