3643650 has 48 divisors (see below), whose sum is σ = 10044000. Its totient is φ = 971280.

The previous prime is 3643639. The next prime is 3643657. The reversal of 3643650 is 563463.

3643650 is a `hidden beast` number, since 3 + 6 + 4 + 3 + 650 = 666.

3643650 is a nontrivial binomial coefficient, being equal to C(2700, 2).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3643657) 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, 1 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

Almost surely, 2^3643650 is an apocalyptic number.

3643650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3643650 is the 2699-th triangular number and also the 1350-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3643650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5022000).

3643650 is an abundant number, since it is smaller than the sum of its proper divisors (6400350).

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

3643650 is a wasteful number, since it uses less digits than its factorization.

3643650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3643650 is about 1908.8347230706. The cubic root of 3643650 is about 153.8788331220.

The spelling of 3643650 in words is "three million, six hundred forty-three thousand, six hundred fifty".