3688816212 has 36 divisors (see below), whose sum is σ = 9327345300. Its totient is φ = 1229231232.

The previous prime is 3688816163. The next prime is 3688816267. The reversal of 3688816212 is 2126188863.

It can be written as a sum of positive squares in 2 ways, for example, as 2405313936 + 1283502276 = 49044^2 + 35826^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120664 + ... + 148112.

It is an arithmetic number, because the mean of its divisors is an integer number (259092925).

Almost surely, 2^3688816212 is an apocalyptic number.

It is an amenable number.

3688816212 is an abundant number, since it is smaller than the sum of its proper divisors (5638529088).

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

3688816212 is a wasteful number, since it uses less digits than its factorization.

3688816212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31192 (or 31187 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 3688816212 is about 60735.6255586456. The cubic root of 3688816212 is about 1545.1204455696.

The spelling of 3688816212 in words is "three billion, six hundred eighty-eight million, eight hundred sixteen thousand, two hundred twelve".