3684211812 has 72 divisors (see below), whose sum is σ = 9612439200. Its totient is φ = 1189191168.

The previous prime is 3684211807. The next prime is 3684211813. The reversal of 3684211812 is 2181124863.

3684211812 is a `hidden beast` number, since 368 + 4 + 211 + 81 + 2 = 666.

3684211812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3684211813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129364 + ... + 155252.

It is an arithmetic number, because the mean of its divisors is an integer number (133506100).

Almost surely, 2^3684211812 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 3684211812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4806219600).

3684211812 is an abundant number, since it is smaller than the sum of its proper divisors (5928227388).

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

3684211812 is a wasteful number, since it uses less digits than its factorization.

3684211812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26025 (or 26020 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 3684211812 is about 60697.7084575686. The cubic root of 3684211812 is about 1544.4773020531.

It can be divided in two parts, 3684 and 211812, that added together give a triangular number (215496 = T₆₅₆).

The spelling of 3684211812 in words is "three billion, six hundred eighty-four million, two hundred eleven thousand, eight hundred twelve".