3650643 has 8 divisors (see below), whose sum is σ = 5408400. Its totient is φ = 2433744.

The previous prime is 3650617. The next prime is 3650651. The reversal of 3650643 is 3460563.

3650643 is a `hidden beast` number, since 3 + 650 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 3650643 - 2⁶ = 3650579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 135209 = 3650643 / (3 + 6 + 5 + 0 + 6 + 4 + 3).

3650643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3650663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67578 + ... + 67631.

It is an arithmetic number, because the mean of its divisors is an integer number (676050).

Almost surely, 2^3650643 is an apocalyptic number.

3650643 is a deficient number, since it is larger than the sum of its proper divisors (1757757).

3650643 is a wasteful number, since it uses less digits than its factorization.

3650643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135218 (or 135212 counting only the distinct ones).

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

The square root of 3650643 is about 1910.6655908348. The cubic root of 3650643 is about 153.9772131349.

The spelling of 3650643 in words is "three million, six hundred fifty thousand, six hundred forty-three".