3685665368 has 128 divisors (see below), whose sum is σ = 8895744000. Its totient is φ = 1390072320.

The previous prime is 3685665359. The next prime is 3685665409. The reversal of 3685665368 is 8635665863.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2578478 + ... + 2579906.

It is an arithmetic number, because the mean of its divisors is an integer number (69498000).

Almost surely, 2^3685665368 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 3685665368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4447872000).

3685665368 is an abundant number, since it is smaller than the sum of its proper divisors (5210078632).

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

3685665368 is a wasteful number, since it uses less digits than its factorization.

3685665368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585 (or 1581 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 56.

The square root of 3685665368 is about 60709.6810072331. The cubic root of 3685665368 is about 1544.6803928982.

The spelling of 3685665368 in words is "three billion, six hundred eighty-five million, six hundred sixty-five thousand, three hundred sixty-eight".