3648636 has 36 divisors (see below), whose sum is σ = 9441432. Its totient is φ = 1187424.

The previous prime is 3648587. The next prime is 3648643. The reversal of 3648636 is 6368463.

3648636 is a `hidden beast` number, since 3 + 648 + 6 + 3 + 6 = 666.

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 3648636.

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, 370 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (262262).

Almost surely, 2^3648636 is an apocalyptic number.

3648636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3648636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4720716).

3648636 is an abundant number, since it is smaller than the sum of its proper divisors (5792796).

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

3648636 is a wasteful number, since it uses less digits than its factorization.

3648636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2405 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 3648636 is about 1910.1403089826. The cubic root of 3648636 is about 153.9489908084.

The spelling of 3648636 in words is "three million, six hundred forty-eight thousand, six hundred thirty-six".