3686404736 has 64 divisors (see below), whose sum is σ = 8401519680. Its totient is φ = 1578313728.

The previous prime is 3686404723. The next prime is 3686404739. The reversal of 3686404736 is 6374046863.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (3686404739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1569515 + ... + 1571861.

It is an arithmetic number, because the mean of its divisors is an integer number (131273745).

Almost surely, 2^3686404736 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 3686404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4200759840).

3686404736 is an abundant number, since it is smaller than the sum of its proper divisors (4715114944).

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

3686404736 is a wasteful number, since it uses less digits than its factorization.

3686404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The square root of 3686404736 is about 60715.7700766448. The cubic root of 3686404736 is about 1544.7836769077.

The spelling of 3686404736 in words is "three billion, six hundred eighty-six million, four hundred four thousand, seven hundred thirty-six".