3639809212 has 24 divisors (see below), whose sum is σ = 6867513072. Its totient is φ = 1677984000.

The previous prime is 3639809167. The next prime is 3639809219. The reversal of 3639809212 is 2129089363.

It is a super-2 number, since 2×3639809212² = 26496422199520121888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639809219) 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, 6087 + ... + 85537.

It is an arithmetic number, because the mean of its divisors is an integer number (286146378).

Almost surely, 2^3639809212 is an apocalyptic number.

It is an amenable number.

3639809212 is a deficient number, since it is larger than the sum of its proper divisors (3227703860).

3639809212 is a wasteful number, since it uses less digits than its factorization.

3639809212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80349 (or 80347 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 3639809212 is about 60330.8313551206. The cubic root of 3639809212 is about 1538.2474598765.

The spelling of 3639809212 in words is "three billion, six hundred thirty-nine million, eight hundred nine thousand, two hundred twelve".